terryMc Loc: Arizona's White Mountains

Why do cameras have full auto and full manual options and everything in between? Some people don't like to make their lives too complicated, and "good enough" is good enough...

CHG_CANON Loc: the Windy City

Why did I have a BLT for breakfast? And black coffee?

DirtFarmer Loc: Escaped from the NYC area, back to MA

Homemade blueberry scone here with a cup of milk

Longshadow Loc: Audubon, PA, United States

MJPerini

True polarization is better done with a filter, I haven't seen an an editing ap that can do it as well.
For Red filter effects I prefer channel mixer in post, you can get more subtle results AND you still have your original.

SalvageDiver Loc: Huntington Beach CA

For anything other than a polarizer or ND filter, all others can be done in post with much better control of the final image. Even the ND filter can be effectively replicated without the filter. The CPL is only required if your using a DSLR. If your using a mirrorless, the polarizer doesn't need to be Circular polarized, a simple linear polarizer will be just as effective without the added quarter waveplate.

CHG_CANON Loc: the Windy City

I still use ND filters for really long exposures and (very occasionally) to let me use wide / widest apertures in very bright light. Two situations controlled at the camera level, not in post.

SalvageDiver Loc: Huntington Beach CA

If you don't have an ND filter handy, you can take a series if images and PP to duplicate the effect of the ND. You can even hand hold during the burst and align in PS. It works.

CHG_CANON Loc: the Windy City

LOL

Hip Coyote

Early in my photography quest, I went on a photo tour with a guy in Prague. He liked using very dark ND filters and very long exposures in heavily traveled areas that essentially removed all visual evidence of human movement. They were great photos of the square, etc. But horribly boring. Had I been more advanced, I might have used a much less heavy ND filter to purposely get blurry people moving across the shots...way more interesting.

We went on to Auschwitz where I fumbled around taking photos...and I never show those photos. But later, saw an exhibit of a photog who effectively used an ND filter to capture sharp images of the physical facility but with very blurry images of people movement. It looked like spirits were there. Very powerful and meaningful photography. If only I knew then....

Filters are tools...pick the right tool for the right photo. Have an artistic vision when using a filter. I see no reason to use a red filter since that effect can be achieved in PP. I only carry a polarizer since my Oly camera has a built in, albeit electronic, ND filter capability.

brentrh Loc: Deltona, FL

Polarizer yes I shoot RAW and post process

larryepage Loc: North Texas area

Check your manual. If you are shooting in Monochrome, your camera may give you the option of applying filter effects electronically. All of my digital cameras provide the option of Yellow, Orange, or Red filters when shooting in Monochrome. The advantage of this approach is that you don't lose the up to 2.5 stops of exposure that comes with the physical red filter.

MrPhotog

There are a dwindling number of commercial uses for monochrome images. The medium is still very popular with artists, though. Cameras which have a monochrome option can produce these mages without additional post processing. This appeals to those who are not skilled with using post processing software, or consider themselves ‘purists’ who only want to use images straight out of the camera.

The manufacturers of strictly monochrome cameras are using the 4 dot color matrix to create a longer tonal range in monochrome, and maybe eke out a bit more sharpness by eliminating the filter layer. They don’t sell a lot of these, but they sell enough to keep making them. And these aren’t cheap.

SuperflyTNT Loc: Manassas VA

Shoot in color and do the entire conversion in post. Actually I might set the camera for B&W if I knew I wanted B&W for a scene, but the image file would still be raw and need conversion in post. Usually I’ll wait until I’m processing and decide something might be good in B&W and try it then.

SuperflyTNT Loc: Manassas VA

How are you replicating an ND in post? I use ND filters quite a bit and there is no easy way to replicate what they do.