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04/10/2021 10:13:18 PM · #1 |
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04/10/2021 04:50:39 AM · #2 |
| I've enjoyed reading this thread but still not sure how to 'fake' the blue filter but am thinking if I use a blue tone overlay then process the image into b/w it might work? I have a blue filter (80a) from my old b&w film days but it is small and only fits my macro lens so restricting so then I got to looking at the monochrome settings in my camera (Oly E1 mk2) and there are filters built in - red, orange, yellow, and green - but no blue for whatever reason! I am thinking other cameras are similar so perhaps a future challenge could be a monochrome with one of those filters - the green one is fabulous for foliage effects :) Cheers! |
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04/09/2021 07:17:12 PM · #3 |
Thanks, Gen.
I'll continue researching and thinking... including your advice.
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04/09/2021 07:06:31 PM · #4 |
Originally posted by Lydia:
Color me blue... I'm sad that I still don't understand this completely.
Is it true that the blue filter is supposed to enhance the blues in an image?
ETA: a color image |
It may "enhance" or simply lighten the blues.
Remember what a filter (any kind) does -- it allows certain things through and blocks others. So at any given exposure a blue filter will allow the light reflected from blue objects through, while light reflected from red and green objects will be partially blocked, leading to those being effectively under-exposed. If you "properly" expose the reds and greens then the blues will be effectively over-exposed.
It might help if you can find some blue sunglasses or that cellophane used for wrapping to look through (or shoot through!) to get a better idea of what things might look like ... |
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04/09/2021 06:46:48 PM · #5 |
Color me blue... I'm sad that I still don't understand this completely.
Is it true that the blue filter is supposed to enhance the blues in an image?
ETA: a color image
Message edited by author 2021-04-09 18:47:08. |
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04/09/2021 11:47:19 AM · #6 |
Originally posted by Lydia:
When I make a BW image, I use the sliders to increase or decrease the different colors.
Isn't my sliding the Blue slider and the Cyan slider before pushing the button to make it BW the same as a Blue Filter? Or am I still not understanding the challenge? |
In my opinion it's the same thing. I've just too lazy to do it that way when Nik has filters that do it for me.
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04/09/2021 11:21:10 AM · #7 |
When I make a BW image, I use the sliders to increase or decrease the different colors.
Isn't my sliding the Blue slider and the Cyan slider before pushing the button to make it BW the same as a Blue Filter? Or am I still not understanding the challenge?
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04/07/2021 04:29:32 PM · #8 |
| Okay thanks. It's actually quite fun to pull out those old filters and play with them again in monochrome lol! |
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04/07/2021 04:02:48 PM · #9 |
Originally posted by Dorsetgirl:
Originally posted by LevT:
Blue filter only works on colors images makin blue tones brighter and red tones darker. You can convert it to grayscale afterwards |
So that being said does that mean I cannot set my camera to monotone and attach a blue filter (in my case an old 80a filter which I used originally from my old b&w film days) which enhances tones in an monochromatic image but doesn't add colour? |
No, of course you can, this was the original purpose of real blue filters. I only meant using blue filters inside Photoshop or similar software. After you have taken a monochrome image and uploaded it to your computer, applying blue filter will not change its tonality |
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04/07/2021 03:17:12 PM · #10 |
Originally posted by LevT:
Blue filter only works on colors images makin blue tones brighter and red tones darker. You can convert it to grayscale afterwards |
So that being said does that mean I cannot set my camera to monotone and attach a blue filter (in my case an old 80a filter which I used originally from my old b&w film days) which enhances tones in an monochromatic image but doesn't add colour? |
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04/07/2021 01:18:10 PM · #11 |
Just to bring this around full circle, again
here's the challenge description:
Filters are often very helpful in photography. They can correct light balance, enhance colors for black and white conversion, add mood, or do other things. Use a blue filter, either on-camera or the equivalent in your post-processing, to enhance your photo. The photo may ultimately be color or black and white. |
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04/07/2021 01:16:59 PM · #12 |
Originally posted by GeneralE:
And again, the final image does NOT have to be B&W for this challenge. |
and likewise, the final image does NOT have to be in Color for this challenge. :-) It can be either. |
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04/07/2021 01:13:31 PM · #13 |
Originally posted by MargaretNet:
This discussion put me off entering this challenge and considering the ever reducing numbers of participants, that is certainly not good.
Even after reading everything I could find I still do not know what difference the blue filter does and would I recognize it its effect if I saw it. |
A blue filter will let blue light through and (partially) block other colors. Blue items should appear lighter, and items toward the red end of the spectrum should appear darker. Items in-between (yellows, greens) should shift somewhat less.
If you shoot someone holding a can of Coke up against the sky a blue filter should make the can look almost black against a white sky (using the same exposure you'd use without the filter); converting to B&W should yield a higher-contrast image than one shot without the filter.
FWIW a red filter should do the opposite -- lighten the reds and blacken the blues.
I encourage you (and everyone) to "shoot for the challenge" as a learning experience, even if you eventually decide to not enter.
And again, the final image does NOT have to be B&W for this challenge. |
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04/07/2021 12:52:25 PM · #14 |
Originally posted by vawendy:
That's the problem with this challenge -- I think people will expect the resulting image to be blue. That's not the purpose of a blue filter for b&w |
The image does not have to be B&W. |
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04/07/2021 11:13:17 AM · #15 |
This discussion put me off entering this challenge and considering the ever reducing numbers of participants, that is certainly not good.
Even after reading everything I could find I still do not know what difference the blue filter does and would I recognize it its effect if I saw it.
Message edited by author 2021-04-07 11:14:05. |
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04/07/2021 10:41:09 AM · #16 |
This discussion makes me think that an interesting challenge would be to process the same image using black and white conversions with two diffent filters and combine them into one entry as we did with Oz to Kansas.
Something like this:
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04/07/2021 08:31:56 AM · #17 |
Originally posted by GinaRothfels:
It's because of colour filters that I always shoot in colour and convert to bw afterwards. Nik Silver Efex offers a choice of colour filters which can be applied to any of their presets and with some of those presets the variations can be really dramatic. |
That's the only way I know how to do it. I only know about color filters before B&W because of reading a tiny bit on Ansel Adams. I've seen that Nik has the color filters on the right hand side, and have looked at them only once or twice. But I'm thinking it may do very interesting things on the aquarium shots. Just doing the filter, converting it to b&w and changing it to luminosity blend does interesting things to the color photo. |
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04/07/2021 07:25:39 AM · #18 |
Originally posted by GinaRothfels:
... Nik Silver Efex offers a choice of colour filters ... |
Oh! I forgot about those. Thanks! Might have to revisit what I've done now for this challenge. :-) |
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04/07/2021 06:59:01 AM · #19 |
It's because of colour filters that I always shoot in colour and convert to bw afterwards. Nik Silver Efex offers a choice of colour filters which can be applied to any of their presets and with some of those presets the variations can be really dramatic.
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04/07/2021 05:57:15 AM · #20 |
| Set up a discussion over here if anyone wants to hash it out some more, now or in the future. |
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04/07/2021 05:55:52 AM · #21 |
Originally posted by Bear_Music:
In the case of blue filters, the description was deliberately left wide open. |
Actually Robert, I think your description on blue filters was just about right. It had some definition and suggestions but nothing that boxed the community in. |
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04/07/2021 02:07:57 AM · #22 |
Originally posted by glad2badad:
Google results ...
Example #1 |
From this link:
"Blue filters are not as commonly used in black and white photography because they lighten the sky and darken highlights or colors that are seen as light. Blue filters can draw attention to haze and fog, which can enhance the mood of the photo if needed. Its a good idea to experiment with this filter using the B&W setting, as opposed to shooting in color and converting the image to B&W in an image processor." |
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04/06/2021 11:01:44 PM · #23 |
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04/06/2021 10:31:46 PM · #24 |
Sometimes it feels like there's this *terrible* need by a certain percentage of members to see challenges DEFINED in such a way as it's obvious to everybody exactly what they're supposed to do and everyone can and should target their vision in the same direction. Way back in the beginning I tried to accommodate that by writing extremely detailed challenge descriptions that laid out my perspective on what the challenge meant as if it were cut-and-dried. I got a lot of flak for that, and I soon understood why; life is much more interesting when we each and all figure things out for ourselves and get a little brave or tricky or feisty or downright weird. I'd hate to see that quashed by over-defining challenges.
In the case of blue filters, the description was deliberately left wide open. |
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04/06/2021 10:05:34 PM · #25 |
Originally posted by vawendy:
That's the problem with this challenge -- I think people will expect the resulting image to be blue. That's not the purpose of a blue filter for b&w |
The image doesn't have to be B&W, and sometimes an image will be blue when shot with a blue filter (especially color images). The challenge description list several other things a blue filter can be used for besides enhancing certain colors in B&W photography.
Under the Standard rules you don't have to "prove" you used a blue filter -- you don't even have to ... |
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