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Graham
Search found 209 matches
- Thu Jan 08, 2009 7:31 am
- Forum: Equipment Discussions
- Topic: Eye pieces
- Replies: 3
- Views: 1669
- Thu Jan 08, 2009 4:25 am
- Forum: Equipment Discussions
- Topic: Eye pieces
- Replies: 3
- Views: 1669
Eye pieces
I've got a Nikon SMZ-10 stereo microscope currently with 10X eye pieces. I could do with some more magnification so would like to get hold of some 15 and/or 20X eye pieces. I'm talking to Nikon but I think they would prefer to sell me a new microscope (and part of me would like to buy one). But if I...
- Tue Dec 30, 2008 5:59 am
- Forum: Equipment Discussions
- Topic: Can 63mm f3.5 El-Nikkor be "hacked" to f2.8?
- Replies: 13
- Views: 4086
- Fri Dec 26, 2008 11:49 am
- Forum: Equipment Discussions
- Topic: What is this Schneider?
- Replies: 45
- Views: 10692
It's sold under a lot of names, in the UK Polymorph is a popular one. You can often find it on ebay sold under lots of names. Its very good stuff, a little like nylon but more chewy. With some inventiveness you can make interesting parts, I made a spring by rolling it out into a long sausage before ...
- Wed Dec 24, 2008 5:41 pm
- Forum: Equipment Discussions
- Topic: What is this Schneider?
- Replies: 45
- Views: 10692
- Thu Dec 18, 2008 6:53 pm
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
I have found a source of in expensive Fresnel prisms to recreate the biprism type stereo. http://www.west-op.com/pressonprism.html These sticky back prisms are made by 3M to correct for some eye problems such as double vision. They come in a variety of strengths too so I hope to work out which one I...
- Thu Dec 18, 2008 3:13 am
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
One other thing I was going to say is that if anyone fancied trying a programmable aperture they could make the mask as a large disk with the apertures around the circumference. This could be laser cut very cheaply (in fact I have a laser cutter so would be happy to help any experimenter) and would ...
- Thu Dec 18, 2008 3:11 am
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
Craig, thanks that's a bit easier on peoples connections than the video on their website. Tardigrade37, thanks for the reference! For my stereo I am going to try a bi-prism in front of the lens, I'm having trouble finding one of these so I'm going to use two Fresnel prisms back to back. As has been ...
- Tue Dec 16, 2008 6:56 pm
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
After thinking more about the first system, the "light field camera" I realised that for stereo I would just need an array of cylindrical lenses, much like are used to create lenticular holograms but with a longer focal length to account for the cover glass of the sensor. This was confirmed in anoth...
- Tue Dec 16, 2008 5:05 am
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
And check this out:
http://uk.youtube.com/watch?v=8ENfPYpkHp4
They use a programmable aperture to capture the light field for a similar result. No use to me but very interesting and note their simple first attempt.
Graham
http://uk.youtube.com/watch?v=8ENfPYpkHp4
They use a programmable aperture to capture the light field for a similar result. No use to me but very interesting and note their simple first attempt.
Graham
- Tue Dec 16, 2008 3:23 am
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
This is very interesting:
http://www-graphics.stanford.edu/papers/lfcamera/
You stick a micro lens array in front of the sensor and that allows stereo to be produced digitally and it even allows extended depth of field etc. There is a tech report and if you have big "pipes" a large video.
Graham
http://www-graphics.stanford.edu/papers/lfcamera/
You stick a micro lens array in front of the sensor and that allows stereo to be produced digitally and it even allows extended depth of field etc. There is a tech report and if you have big "pipes" a large video.
Graham
- Mon Dec 15, 2008 8:16 am
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
- Mon Dec 15, 2008 6:35 am
- Forum: Equipment Discussions
- Topic: Stereo macro with one shot
- Replies: 11
- Views: 3541
Stereo macro with one shot
I've been taking high speed macro video for a while now and recently the people I borrow the camera from have upgraded to a Phantom V12 which has almost twice the sensor size and identical pixel size. I wondered about trying to do some form of stereo macro, capturing both frames on one sensor. I fou...
- Fri Dec 12, 2008 3:24 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Pasteur pipets
- Replies: 7
- Views: 2048
- Thu Dec 04, 2008 9:08 am
- Forum: Equipment Discussions
- Topic: Volpi fibre optic light
- Replies: 12
- Views: 9236
Rik, The PL800 does indeed have an iris and yes it does use an EKE21V150 bulb. I just bought a stack of spares, not from Edmund of course, they seem to have a X2 pricing policy. Another thing I noticed that these bulbs look almost identical to the sorts of things you buy for your kitchen only with t...