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Monochrome conversion

  
 
allan473
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p.1 #1 · Monochrome conversion


I have been reading in Leica groups how the Q monochrome cameras are the best way to get excellent b/w. I don’t want to spend $4500 or more to buy one of those but I do have an extra a Sony, a ar5 which I could get converted to monochrome for $1200.

I wonder if anyone has done such a conversion with a Sony A camera. If so, do you think it made a noticeable improvement in b/w images compared tp conversion in processing.

TIA.




Feb 16, 2026 at 05:35 PM
msadat
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p.1 #2 · Monochrome conversion


i have done three sony conversion using https://monochromeimaging.com. i have also had the leica M monochrome.

its hard to answer your questions, but i shoot the sony with voitlander manual lenes. its slow but nice. the fact that u can only take bw pictures changes my mind set. converting an image to BW also works just fine.



Feb 16, 2026 at 05:46 PM
BenjaminSmith
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p.1 #3 · Monochrome conversion


I prefer to shoot in color and convert in post. I appreciate the greater tonal flexibility I have with color channel adjustments or even white balance adjustments. Losing these abilities by shooting a monochrome body would not improve my final images. I find it easy enough to visualize in B&W. I *believe* you can set the rear display or viewfinder to monochrome if you want to see in monochrome.


Feb 18, 2026 at 08:45 PM
aCuria
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p.1 #4 · Monochrome conversion


There’s a Ricoh GR IV Monochrome but I think it’s pointless

On a color camera, the bayer filter throws away ~half? the light, while a monochrome camera retains this light and should yield better image quality as a result

However a FF camera has double the sensor area of the Ricoh GR IV Monochrome, so in theory if you own a FF camera you won’t benefit much from an apsc b&w camera.

It’s the same thing if you own a medium format camera, converting MF rgb to b&w should be competitive compared to a FF b&w

Edited on Feb 19, 2026 at 06:15 AM · View previous versions



Feb 18, 2026 at 09:53 PM
old-gregg
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p.1 #5 · Monochrome conversion


aCuria wrote:
On a color camera, the bayer filter throws away ~half? the light, while a monochrome camera retains this light and should yield better image quality as a result


I usually agree with your posts, but not here. :-) There is more to B&W perceptual quality than just the amount of light. Simply removing the CFA gives you desaturated color image. It may have lower noise, but perceptually you are not going to like it. This is why color sanitization has always been on the intersection of science and art for B&W film designers, and spectral sensitivity curves mattered just as much as film speed.

You have to tone down certain frequencies for a pleasant B&W image. I never looked into dedicated monochrome cameras, but I suspect/hope they're doing more than just removing a CFA. IIRC there was a thread here where we argued that mono-converted cameras pick up too much parasitic spectra.



Feb 18, 2026 at 11:29 PM
aCuria
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p.1 #6 · Monochrome conversion


old-gregg wrote:
I usually agree with your posts, but not here. :-) There is more to B&W perceptual quality than just the amount of light. Simply removing the CFA gives you desaturated color image. It may have lower noise, but perceptually you are not going to like it. This is why color sanitization has always been on the intersection of science and art for B&W film designers, and spectral sensitivity curves mattered just as much as film speed.

You have to tone down certain frequencies for a pleasant B&W image. I never looked into dedicated monochrome cameras, but I suspect/hope they're doing more
...Show more

Hi Greg, I do agree with you. That's why when shooting B&W film we used color filters (yellow / orange usually)

I suppose on a B&W digital camera you would also use the same color filters.

However without the bayer array you do not lose light from the spectra you want to keep.



Feb 19, 2026 at 01:09 AM
pfoiles
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p.1 #7 · Monochrome conversion


allan473 wrote:
I have been reading in Leica groups how the Q monochrome cameras are the best way to get excellent b/w. I don’t want to spend $4500 or more to buy one of those but I do have an extra a Sony, a ar5 which I could get converted to monochrome for $1200.

I wonder if anyone has done such a conversion with a Sony A camera. If so, do you think it made a noticeable improvement in b/w images compared tp conversion in processing.

TIA.



Well just because a self selected group in a Leica forum thinks Q monos are the way to go does not make it true. I have owned and shot a Q2 Mono and have a mono converted A7Riii. There are two clear advantages to a mono camera, about a stop better low light sensitivity and the psychological effect of knowing you are fully committed to making a mono image. The improved resolution is real but not that much of an advantage when compared to the high mp color bodies available. The supposed better tonality is more to do with skill in processing than any inherent property of mono sensors.

The major disadvantage of a mono sensor is that you loose the ability control tonality by modifying the response of different colors. To me, in most situations, this far outweighs any advantages a mono sensor may have.

I sold the Q2 Mono because I cannot abide the 28mm fixed focal length (love my new Q3-43) and the mono sensor was more of a minus than a plus. I still have the mono converted A7Riii but rarely shoot it.

As an aside, shortly after I bought the Q2 Mono I took a digital B&W workshop from a leicaphile who I knew owned a Leica Mono camera. I was surprised to learn that 80% of their B&W work was from color Leica bodies, not the Mono, because they had so much more control over the tonality using the color information.

All that being said shooting a mono sensor may be an itch you just have to scratch for yourself. It may float your boat and if it does great but don't be surprised if in the end you are unimpressed.

To that end Leica or a converted Sony are not your only options. As mentioned Ricoh just released the GR IV Mono and have the K3-III Mono dSLR. APSc, yes but substantially cheaper than a Leica if you wan to give mono a try.



Feb 19, 2026 at 05:27 PM
allan473
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p.1 #8 · Monochrome conversion


Thanks for your opinions on ownership of a mono. Good thoughts foe me to remember.


Feb 20, 2026 at 08:48 AM
gdanmitchell
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p.1 #9 · Monochrome conversion


For the most part, people who shot BW film back in the day (like I did for years) would be astounded to hear that some today think that using a mono-only camera would be an improvement over the ability to capture full color image data and bring that into post.

The theory is that by using a mono-only sensor we can get increased resolution and perhaps more dynamic range. The first problem with that notion is that we can already produce excellent black and white images using color sensor cameras. I’d argue that the monochrome images that begin as color captures today can end up being prints of outstanding quality, on the same level as prints made using film and the optical-chemical darkroom. So the mono cameras claim to fix a “problem” that really isn’t.

And to do so they take away the capacity to have much greater control over the production of monochrome images than we ever had with film. Yes, back then we could put a filter on the camera to alter tonal relationships in our finished images, but by comparison to what we can do when we bring full color data into the post-processing phase that seems extremely crude.

Consider classic example of using a red (or possibly yellow or orange) filter to increase contrast between clouds and sky. At the time of exposure you make an educated guess regarding the effects of the various filter options, then you pull one of the packet of color filters you are carrying and put it in front of the lens. You alter the exposure to compensate for the light lost to the filter, and you accept that the filter effect will operate on the entire image, even those parts that don’t benefit from it. You have a general idea of the likely effect, but you won’t know if it is right (too strong? not strong enough?) until much later after you develop the film and make contact prints.

With a digital color capture you make the best unaltered exposure possible and then bring the full color image data into the post-processing phase. Here you have far, far more control over the filtering effects and you can even test options against one another. Let’s say that you decide that a red filter is what works best, but that effect is a bit stronger or wearier than you anticipated. No problem, since you can adjust the opacity of the filtering in post. Or let’s say that you realize that the filter that works for sky does not work for other elements of the scene such as water, meadow, or forest. You can mask the filtering so that it only applies to the sky. Or you can use a different filter on the vegetation — perhaps a green filter to lighten its tones.

In the end, capturing full color image data produces outstanding monochromatic prints and gives the photographer far more creative control over the image.



Feb 20, 2026 at 10:07 AM
freaklikeme
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p.1 #10 · Monochrome conversion


I have my mono-converted rII for six years (will be seven in October) and am still madly in love with it. Mine was converted by Monochrome Imaging and, because I love film-era (RF and MF SLR) lenses, I went with the bare-sensored, full-spectrum mod to give me the best response from them. I had concerns about the longevity of the sensor in that arrangement, but I feel those have been answered now, and I love the full-spectrum arrangement. I picked up a cheap 550-750nm filter and it's proven to be a great tool to adjust contrast and the overall look of the image. The downside to that is, if I want I want to shoot just the visible spectrum, I have to put an UV/IR filter in front of the lens. Good filters, like B&W 486 or Hoya, have no transmission or resolution loss, and with the cheaper filters you take your chances. That covers everything down to 24mm. Wider than that, you have to switch to a hot mirror filter (I prefer multicoated BG-40) which can be both expensive and difficult to source depending on the size. Consequently, I have quite a few Minoltas where the filters fronting them cost more than the lenses themselves.

Of course, you don't have to do either bare sensor or full-spectrum, and, if you want to use e-mount lenses, you'll want to get some replacement coverglass so you won't negatively impact their performance. If IR doesn't interest you, then you'll also want a replacement hot filter in the mix.

Caveats regardless of conversion type:

White balance control is gone. You have a daylight balanced sensor, and that does matter if you want to keep blacks black and whites white under all lighting conditions.

You can realize about a stop advantage in transmission, assuming you're not using a front color-correcting filter. They typically lower transmission by a stop or two, so you're either breaking even or losing a stop. Still, there are plenty of times you can shoot filterless (daylight, with a stobe, and night shooting under mixed lighting conditions) with minor contrast adjustments to get it looking good. And you can shoot filterless all the time and just get really good with manipulating your tone curve and applying masks for more subtle effects.

Even using filters, not everything's going to be perfect, but they do a lot to help me minimize my time in post, and that's my goal. Mono or color, I put it the work to get everything as right as I can in camera.

AF is limited to CDAF, since you're scraping the PDAF sensors off with the CFA.

Your service options will be more limited should anything go wrong with the camera. Precision, for example, last I checked, won't deal with a camera with a modded sensor because they can't replace it themselves if they damage it. So you either need to get good at self-repair or find a shop that will work with you on anything like a dead shutter or a malfunctioning power supply. I haven't run into any problems with the rII, so, if and when I do, I'm just going to say it served me well and let it become shelf decoration while I get an rIV converted.

Upsides:

You get more resolution out of it than you do the same camera/lens/setting/subject with a CFA, and that's independent of filters, so long as you're using a high quality filter.

Noise and CA present entirely different in mono shots than they do in converted shots. Your files will look consistently cleaner, regardless of ISO and lens.

Despite what they tell you, there's no adjustment a converter can make to a color shot that you can't make to a mono shot using different methods.

It's hella fun.

So, if that all works for you, it should be a good fit. It has been for me.



Feb 20, 2026 at 09:46 PM
 


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gdanmitchell
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p.1 #11 · Monochrome conversion


freaklikeme wrote:
Despite what they tell you, there's no adjustment a converter can make to a color shot that you can't make to a mono shot using different methods.


Explain to us how you would apply a red filter with reduced opacity to the sky in a shot while applying a green filter to vegetation, and no filter to rocks in the same shot, or how you you would graduate the intensity of the color filtering accross the frame, or how you might apply a color filter to only areas of the frame that were bright and red…



Feb 20, 2026 at 11:25 PM
freaklikeme
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p.1 #12 · Monochrome conversion


gdanmitchell wrote:
Explain to us how you would apply a red filter with reduced opacity to the sky in a shot while applying a green filter to vegetation, and no filter to rocks in the same shot, or how you you would graduate the intensity of the color filtering accross the frame, or how you might apply a color filter to only areas of the frame that were bright and red…


Partially the same way you would; with the judicious application of masks. The rest is just curve manipulation.



Feb 20, 2026 at 11:44 PM
guidostow
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p.1 #13 · Monochrome conversion


But the monochrome files take all color based selection off the table. While luminance and manual brushed in selections are still available, loosing color removes an important set of tools from the modern tool kit. I use IR converted cameras for a lot of my b&w work and face the same restrictions. It is a real trade-off.


Feb 21, 2026 at 07:05 AM
Nifty Fifty
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p.1 #14 · Monochrome conversion


freaklikeme wrote:
Despite what they tell you, there's no adjustment a converter can make to a color shot that you can't make to a mono shot using different methods.

Yes, the difference may not be between "works" and "doesn't work", but rather between "works easily in no time" and "is demanding and time-consuming".



Feb 21, 2026 at 08:54 AM
gdanmitchell
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p.1 #15 · Monochrome conversion


freaklikeme wrote:
Partially the same way you would; with the judicious application of masks. The rest is just curve manipulation.


What I described does not work in post if you have only basic monochromatic luminosity image data and no color data to work with.

Regarding the use of masks with monochromatic files, you forego the possibility of selecting masks based on color, a powerful feature in adobe products that can be very useful when creating black and white images.



Feb 21, 2026 at 10:07 AM
guidostow
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p.1 #16 · Monochrome conversion


Also the new Variance tool lets you expand the tonal range of a selection which really helps bring out the tones before you convert too.


Feb 21, 2026 at 12:14 PM
freaklikeme
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p.1 #17 · Monochrome conversion


guidostow wrote:
But the monochrome files take all color based selection off the table. While luminance and manual brushed in selections are still available, loosing color removes an important set of tools from the modern tool kit. I use IR converted cameras for a lot of my b&w work and face the same restrictions. It is a real trade-off.



Nifty Fifty wrote:
Yes, the difference may not be between "works" and "doesn't work", but rather between "works easily in no time" and "is demanding and time-consuming".



guidostow wrote:
Also the new Variance tool lets you expand the tonal range of a selection which really helps bring out the tones before you convert too.


It is undoubtedly more work because our post software has toolsets built around color files, but it can be done. And it gets a lot easier the more you do it.
---------------------------------------------

gdanmitchell wrote:
What I described does not work in post if you have only basic monochromatic luminosity image data and no color data to work with.

Regarding the use of masks with monochromatic files, you forego the possibility of selecting masks based on color, a powerful feature in adobe products that can be very useful when creating black and white images.


Why does it not work? Are you unable to recognize the parts of the image you want to impact and draw the lines around it for masking?

The way I would actually solve the problem is to either go IR around 720nm or, if I really needed the subtlety, take multiple shots (one with red, one with yellow-green, and one with no color filter) and blend them in post. I also have graduated filters and duotone filters available when necessary, because I don't enjoy the type of editing I'm describing any more than I enjoy the type you're describing. I'd rather just get what I want out of the camera.




Feb 21, 2026 at 04:14 PM
gdanmitchell
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p.1 #18 · Monochrome conversion


freaklikeme wrote:

It is undoubtedly more work because our post software has toolsets built around color files, but it can be done. And it gets a lot easier the more you do it.
---------------------------------------------

Why does it not work? Are you unable to recognize the parts of the image you want to impact and draw the lines around it for masking?

The way I would actually solve the problem is to either go IR around 720nm or, if I really needed the subtlety, take multiple shots (one with red, one with yellow-green, and one with no color filter) and blend them in post. I also
...Show more

I can only surmise that you are unfamiliar with how current selection and masking tools work in Photoshop, ACR, and Lightroom. It isn’t up to me to teach you.



Feb 21, 2026 at 05:45 PM
freaklikeme
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p.1 #19 · Monochrome conversion


gdanmitchell wrote:
I can only surmise that you are unfamiliar with how current selection and masking tools work in Photoshop, ACR, and Lightroom. It isn’t up to me to teach you.


Okey-dokey.



Feb 22, 2026 at 12:05 AM







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