Search found 27 matches
- Tue May 22, 2012 6:11 pm
- Forum: Equipment Discussions
- Topic: Not All that Glitters is Gold
- Replies: 96
- Views: 36354
- Wed May 02, 2012 7:10 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Shedding Light On Moss from Behind: A Flash Experiment
- Replies: 10
- Views: 4926
- Tue May 01, 2012 5:49 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Beetle stereo with errors!
- Replies: 4
- Views: 1843
- Thu Apr 19, 2012 3:31 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Ruminations about confusing stacks
- Replies: 15
- Views: 8752
Could the effect be due to a change in magnification at different focus points? It looks like you have inverted perspective in the animated mitutoyo image, so the far section starts out large then decreases in size as the focal point moves toward the rear of the subject. This would also likely have ...
- Fri Mar 09, 2012 8:17 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Stack alignment using specified regions
- Replies: 2
- Views: 1801
ChrisR, In addition to the halos the "normal alignment" version of the branch is blurrier than the "branch alignment" version. The small highlights also tend to become smeared somewhat. It's not so bad here, but more frames/movement would make it much worse. The program takes the source images, alig...
- Fri Mar 09, 2012 4:11 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Stack alignment using specified regions
- Replies: 2
- Views: 1801
Stack alignment using specified regions
Had an idea to improve stacking results for some projects, and thought I'd share the technique in case anyone else wants to implement it: I shot several live moths using a stack-and-stitch approach, only to find out later that despite appearing perfectly still they had in fact moved slowly over the ...
- Sun Nov 06, 2011 6:00 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Vespula germanica 5X with JML 21mm
- Replies: 15
- Views: 4222
Have you tried shooting a stack with the aperture stopped-down? I tried adding a limiter immediately behind the rearmost lens element, but ran into aberrations (mostly astigmatism I think). This probably doesn't affect out-of-focus areas much. How close is your aperture to the rear of the lens? Oh, ...
- Sat Jul 30, 2011 2:13 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Getting caterpillars to hold still
- Replies: 2
- Views: 1439
Getting caterpillars to hold still
Can anyone suggest a technique to make caterpillars hold still? I'm trying to photograph some polyphemus (Antheraea Polyphemus) and nothing I've tried will make them stop moving long enough to focus, let alone stack. I have tried leaving them in the dark, in the fridge for hours, etc... but as soon ...
- Thu Jul 28, 2011 2:27 pm
- Forum: Equipment Discussions
- Topic: Monitors for photography
- Replies: 12
- Views: 6311
Re: Monitors for photography
The TN ones are apparently often only 6 bits per component (64 shades instead of 256 shades)... It's worth mentioning that most of the new e-IPS displays are 6-bit as well, but still retain better viewing angles than TN. The Dell U2311 and U2412 are examples of this. Personally this bothers me sinc...
- Sun Jun 12, 2011 11:34 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cell phone displays
- Replies: 6
- Views: 7088
- Sun Jun 12, 2011 10:09 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cell phone displays
- Replies: 6
- Views: 7088
Thanks for linking to that website Rik, it's better at explaining that any other sites I've found so far. Yes, the E and M fields are always 90 degrees apart around the axis of propagation. What I meant is that the E and M fields may have a temporal phase difference. If you are interested in measuri...
- Sun Jun 12, 2011 7:12 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cell phone displays
- Replies: 6
- Views: 7088
The color shift exhibited when rotating the linear polarizer in front of the HTC Droid means the display is likely emitting elliptically polarized light. For the benefit of anyone curious: All photons have a polarization based on the phase difference between the oscillating electric and magnetic fie...
- Wed Jun 30, 2010 6:39 pm
- Forum: Equipment Discussions
- Topic: OM bellows slipping
- Replies: 9
- Views: 2429
- Sat Jun 26, 2010 7:16 pm
- Forum: Equipment Discussions
- Topic: OM bellows slipping
- Replies: 9
- Views: 2429
- Sat Jun 26, 2010 3:24 pm
- Forum: Equipment Discussions
- Topic: OM bellows slipping
- Replies: 9
- Views: 2429
The nylon is definitely bent as in Rik's link, but not to that extreme. Adding a piece of paper between the nylon and rail improves things, though not quite as much as I would like. Only a single piece of paper will fit currently, so I may try to set something up that will expand the nylon back into...