Dr JLW

Lives in United States New England, United States
Works as a Engr
Joined on Dec 2, 2003

Dr JLW's recent activity

  • One thing to look for is haw far in the infrared its illumination is.  The really cheap ones have enough visible red easily seen in the dark.  The better ones with deeper infrared will state this ...
  • I would like to see how an Angenieux 35 to 70 zoom does. My results @ 24Mpixels are very good wide open.

  • Yes the the rule I gave works for any focal length. The angle of the spot is 2.44 time the wavelength over the diameter of the lens for "far field diffraction. That angle is the proportional to the ...
  • Some numbers tell the story. As a rule of thumb for photography the diffraction disk diameter in microns is about equal to the f/number. A full frame sensor pixels on a 24Mpixels sensor was about 6 ...
  • If you are willing ti manual focus, the "vintage" Canon FD" 50mm macro goes 2:1 and 1:1 with the basic extension tube.  The package costs about $150 including lens tube and adapter. Its working ...
  • I have a lot of  stuff I have used for  is over 20 years old but since this is photography how about lenses?, or at least stuff for photography. I have a a very fine Nikon mount 35-70 mm zoom lens ...
  • Defending superzooms. Interesting question. A quick browse around this and other sites will fond numerous bashing of small sensor cameras for their limits, in my view, most are due to  the low ...
  • Possibly Fujifilm is still making them but selling them re-branded as Kodak and without teh EXR chip. Hopefully they understand the market and it is more educated and nuanced than the self ...
  • How does its use and IQ compare to HS series EXR cameras?
  • In the OP's spirit, I think the point is that some few of old third tier name lenses are quite good. My Miranda Soligor is long gone as is the f/3.5 200mm Komura I had.  Both were superb.  I did ...
  • I have neither seen nor used them, but if, or when my HS-30EXR dies, I  will be taking a good look at the Kodak Astro Zoom cameras. DPR does not even list them in their camera section but I have ...
  • Replied in Why?
    Why, It is what I call a HiFi business.  Hi Fi was high fidelity record playing.  Among its addict the more difficult to use and fragile they better its addicts liked it. High end watches and ...
  • Thanks for the reply. I already have the line tool but it was useful to remind me about control of the arrow head. The line still vanishes after selection which is is the change which seems to ...
  • Best for adapting lenses depends on the lenses you want to adapt. For me with vintage lenses designed for film SLR's,  APS -C with focal reducers is the better than full frame because I get a ...
  • Thanks, I appreciate the update. I am sticking to cutting and pasting.  I am reluctant to learn multi step procedures to do simple things that I now believe Adobe will undo with a new release. I am ...
  • Thanks for the input.  I wonder what Adobe is thinking.  I found some arrows in all legacy shapes.  They work but they are a bit goofy for my use For me for this version using Powerpoint arrows is ...
  • Created discussion thread Draw an arrow with the latest Photoshop
    Photoshop used to allow me to draw arrows with the line tool.  I would select line width arrow geometry select and paint. In the latest release they no longer allow this and no tutorials explain ...
  • Back when travel was feasible, I used a 6000 and SElL10-18  and took about 70% of my shots with it. You do have learn how to use it to get shots with interest and if you are taking a photos with  a ...
  • I agree with the others who write that contemporary designed and manufactured wides are where lenses are most improved over vintage. One trap to avoid are the short focus wides like the super ...
  • Mine was a Contax G1.  Lovely to look at an hold so much that it took me several months to realize it never got a sharp photo.  I even bought several lenses for it. I just could not believe how bad ...
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Total messages 1278
Threads started 63
Last post 4 days ago
Total comments 5
Total likes 45
Last post 2 months ago
Total reviews 1
Last review Mar 14, 2012
Entries 1
Votes cast 0
Last entry Jul 11, 2019
Photos uploaded 1
Last upload Jul 11, 2019