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5,665 reputation
617
bio website pfarrell.com
location outside Washington DC
age 63
visits member for 2 years, 10 months
seen Nov 6 at 18:15

Programming since punched cards


Aug
29
answered Professional grade alternative to Photoshop
Aug
26
comment Is it important that the Canon 1DX isn't specified to autofocus with lenses slower than f/5.6?
This is an awfully subjective question. What is worth it to me is likely to be not worth it to someone else. Plus, we are talking about a $6000 camera body. That puts the whole discussion on another plane.
Aug
26
answered Is it possible to get custom firmware for digital (point and shoot) cameras?
Aug
26
comment Why do people recommend 50mm or other prime lenses as starting lenses for learning photography?
Yes, most folks starting out have crop sensor cameras and so the normal lens is not a 50mm. Sadly, the manufacturers don't seem to think that folks with crop sensor cameras are interested in inexpensive normal lenses. Canon has no about 30mm F-faster than 2.0 lens at anything like the $110 that their 50mm F1.8 is.
Aug
24
comment How much do lens lineups vary across DSLR platforms?
I have a Nikon F and a lot of lenses for it. While the Nikon F mount is the same since the beginning (I think late 50s or early 60s) the fact are that most of my old non-AI lenses will not mount on most modern Nikon bodies. My lenses have the "prong" that was used to couple the lens to the meter on Nikon bodies of the 60s into the mid-70s. The prong will not clear the pentaprism of many modern Nikon bodies. I keep seeing folks say that Nikons use all old F-mount lenses. Its just not true. Lenses made in the past 30 years work. Not all.
Aug
22
answered How can I photograph welding?
Aug
19
comment What would be a good indoor setup to find a lens's sharpest aperture?
To be clear, its actually "faster" shutter speed. 1/135 means 1/200 is good, 1/500 is better. Sometimes, you gotta use a strobe to get the light you need.
Aug
19
comment Does specialty film scanner software provide any real benefits over bundled applications?
@imre, are you sure? Yes, they use infrared light. But they should be able to adjust the focus plain and be selective as to what is at the film position and what is above it.
Aug
19
answered DX vs FX the final comparison
Aug
19
answered What kind of signed statement or writing do I need from a model to own a license on the photo?
Aug
19
comment Does specialty film scanner software provide any real benefits over bundled applications?
I have bought both VueScan and SilverFastAll. The bundled Nikon software for my slide scanner has not been upgraded in at least 5 years. I had to buy the 3rd party software to have it work at all using either Windows 7 or OS-X Lion. I love VueScan and the support is great.
Aug
15
answered Are there software (preferable freeware) that can judge the quality of a photo (jpeg / raw format)?
Aug
15
comment What variable maximizes color in astrophotography?
Yeah, and they filter frequencies of the incoming signal, some of which are not in the visible spectrum. They essentially use layers for each set of filtered image. Very cool stuff, way over my head.
Aug
15
answered What variable maximizes color in astrophotography?
Aug
14
comment Why not separate a tilt shift lens into two separate lenses?
@stan, the good news is that with a view camera, you can adjust the bellows and correct any flange to sensor distance changes. Which means that in addition to being not cheap, they are complex.
Aug
14
answered How can I take natural looking photos of my kids, etc. with a compact camera indoors?
Aug
14
comment How can I take natural looking photos of my kids, etc. with a compact camera indoors?
the white index card off a white ceiling is your easiest and cheapest solution. You may have to adjust the exposure compensation.
Aug
14
answered Simple paint program to adjust alpha values
Aug
13
revised Why not separate a tilt shift lens into two separate lenses?
to -> two
Aug
12
answered Why not separate a tilt shift lens into two separate lenses?