What is a contrast filter ?

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Brad
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#1
I've seen contrast filters used in dark room videos ( Mainly shoot film like a boss) and wondered what they are and how do they work ?

Cheers.
 

Asha

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#2
Well they ermm add contrast to any given image depending on which filter you use.

Sorry if that sound like I'm taking the p*** but what else would you expect a contrast filter to do?

I suspect there are / were a whole host of filters available dor darkroom / enlarger use ...Ilford multigrade ones which if like mine are square and gel like of diifering shades ( which varies the amount of contrast that is exposed onto the paper)
 
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#3
Sorry Asha I have to admit I could of worded the question better ! What I meant was how are they doing it ? Is it just a case of reducing overaul light or are they filtering certain frequencies of light to reduce or boost the contrast ? Can they be used in colour images ? The reason I ask is I have a Sony A6000 which does not like high contrast images and I wondered if this could be helped by a similar filter, the camera in low to mid contrast truly produces some great images and I'd rather be able to produce the images in camera rather than using a PC later. Black and white would not be a problem of course but how would you do this with colour images.
 
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Asha

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#4
Sorry Asha I have to admit I could of worded the question better ! What I meant was how are they doing it is it just a case of reducing overaul light or are they filtering certain frequencies of light to reduce or boost the contrast ? The reason I ask is I have a Sony A6000 which does not like high contrast images and I wondered if this could be helped by a similar filter, the camera in low to mid contrast truly produces some great images and I'd rather be able to produce the images in camera rather than using a PC later. Black and white would not be a problem of course but how would you do this with colour images.
No need to appologies, if anyone needs to, it's me for my response.:sorry:

Tbh I'm not going to be able to help much I don't think as you're asking about effects of how such a filter would work on digital format and colour .....Both of which I don't ( or VERY rarely) shoot.

Someone else more intelligent ( that amounts to just about everyone on here I guess! lol) will be along soon to guide you further ;)
 
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#5
Coloured filters, which selectively transmit some wavelengths while absorbing others, are used in the darkroom for b&w printing, and on the camera when shooting b&w film. To understand how, see:

https://www.ilfordphoto.com/colour-filters/
https://photography.tutsplus.com/tu...contrast-control-in-the-darkroom--photo-17792

For digital cameras, shooting colour, you would generally only use coloured filters for some cheesy effect (and even then, it's more easily done with an image editor). Here is a Sony A6000 Flickr group:

https://www.flickr.com/groups/2558197@N23/pool/

There are plenty of high contrast images, amongst others. I doubt many (if any) were taken with coloured filters. You might want to get a polariser. But first, make sure you are exposing correctly and look at the camera's built-in functions for adjusting contrast and other properties of the image, e.g.:

https://helpguide.sony.net/gbmig/45349331/v1/en/contents/TP0000518236.html
https://helpguide.sony.net/gbmig/45349331/v1/en/contents/TP0000518346.html
https://helpguide.sony.net/gbmig/45349331/v1/en/cover/level3_18.html
 
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#6
Brad, if this is the same issue you've posted about before (film to digital and lack of DR threads) I don't know if a colour filter is going to help. In fact I suspect not.

If this is the same issue in your place I think I'd Google for example A6000 pictures and see the results other people are getting with the same kit and work out how I need to change my approach to get results I'm happier with. You could also ask for advice in the Sony thread. It's mainly a FF Sony thread but several people who regularly post there have or have had A6xxx cameras and may be able to help you.
 
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#7
That makes sense ,I had seen them using them but had never seen the actual thing. I haven't touched the Sony for some time partly as I had lost intrest in it and partly because I haven't had the time to do any photography only trips. The other problem is it has that many setting options that when I do come to use it I've forgotten how to access them ( my memory is really poor due to my fibromyalgia ). At some point I could do with writing down in a little note book some of the settings and how I get to them.
 
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