RawTherapee produced terrible results with my flat field shot, yet with the same flat CornerFix produced great results and I could take the resulting DNG to develop further in RawTherapee.

They do. I’ve since tried a Hutech IDAS LP4 light pollution filter (48mm meant to go on the back of a telescope) and it has wonderful rainbow vignetting.

Hi Dana

The B+W filter is the only one I’ve tried. My guess is that astronomical filters would have the same cyan vignetting as the B+W filter when used on wide angle lenses.

Dave

Do they also exhibit green-cyan vignetting?

I recently purchased a (probably one of the last new-in-box) IS-Pro for primarily for astrophotography but I’m interested in using it during the day also.

An interesting IR-related link:

http://photographic-central.blogspot.com/2012/01/panasonic-lumix-dmc-l1-still-real-gem.html

Ah, okay. I’ve not tried it, but I don’t think you would need to take two photos for that effect as a B&W photo is the same as a colour photo converted to B&W. So you can just take one shot, convert it once in colour and once in B&W, then blend together in PS. If you took two shots you’d have problems with foliage blowing in the wind between the shots, though I guess that could give the image a more ethereal effect.

I think the IS-Pro is equivalent to about 8MP, so it would capture quite a bit less detail than your Pentax. I posted a RAW file using the UVIR-cut filter on the blog, so you can always download that and see how it compares to shots from your camera if you want. I always convert the RAWs at 12MP size in Adobe Camera RAW.

1. That wasn’t me :-((( My guess he takes 2 conseq. shots with and w/o the filter, align and blend untill the result looks good.

2. Didn’t have time to play with different IRs, tried only 720nm. Pretty decent sharpness handheld. My main concern now is UV-IR cutoff (wanted a nikon mount camera as addition to my Pentax K). On a sunny day with B+W filter colors were good, WB a bit off but nothing major, mostly yellowish grass. Unfortunately all pics looked a bit unsharp, even at f8 with 35mm f1.8 lens. Either the filters throw off the AF or I am too used to 16MP K-5… In case I decide to return it, I’ll keep experimenting with K-5. My only 52mm threaded lens is 18-55mm kit that focused well with 720nm IR and exposures weren’t too long.

Nice work Leo, I’d be interested in how you’re layering them, something like soft light blend mode with a selective mask?

Hi Leo

I finally wrote up my findings: Use of filters for full spectrum and infrared photography with the Fuji IS-Pro, Full spectrum, Infrared, and visible light photography at night with the Fuji IS-Pro, and Fuji IS-Pro white balance settings and ACR.

In short, I found the UV filter didn’t make any difference at all. Shooting at night resulted in a lot of lens flare from lights, so I will prefer to use one of my ‘normal’ cameras for that.

https://www.flickr.com/photos/rmstringer/5027716212/in/set-72157610807175317