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 Replies: 73 / Views: 17,028 |
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Valued Member
 Russian Federation
172 Posts |
SSuperDdave, tell me please what you did with my last picture?
Now I see correct uncolored paper instead blueish. It's cool in theory, but funny that I saw before differents in color on some coins in real life as in my last photo but not now.
Probably I must to do calibrate of lights which is unavailable to me.
Edited by Justwalking
11/19/2017 9:00 pm
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Moderator
 United States
23522 Posts |
Quote:
SSuperDdave, tell me please what you did with my last picture. Now I see correct uncolored paper instead blueish.
I imported it into the Gimp and backed off both the Blue and Cyan channels until I reached a "white" I liked in the bright bottom center area. Here's the coin with only the Cyan channel backed off:  Here it is with only the blue backed off:  You'll note the copper changed very little either way. Now, if your light were weighted towards the yellow/red rather than blue/cyan, it's the copper which would have been off rather than the silver-colored coins. |
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Valued Member
Russian Federation
172 Posts |
Thanks for the lesson SsuperDdave.
Rocky, and for your experience too.
Edited by Justwalking
11/19/2017 9:19 pm
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Valued Member
Russian Federation
172 Posts |
Lighting experiment. The coin inside short black tube.  |
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Valued Member
Russian Federation
172 Posts |
New achievment. 100 mm WD at 45 degree D-letter on 1 cent without stacking. Not cropped. Pair of microscope X4 and X1 telecentric lens.  Edited by Justwalking
02/26/2018 3:04 pm
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Valued Member
Russian Federation
172 Posts |
Tried El-Nikkor 50/f2.8N on old wristwatch (not cropped, not stacked)  |
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Pillar of the Community
United States
4038 Posts |
Nice pic. What was the aperture setting?
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Valued Member
Russian Federation
172 Posts |
Thanks Ray. It was f/8 and magnification less than 1:1, so it is not Macro for my sensor.
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Valued Member
Russian Federation
172 Posts |
Now is MORITEX industrial 0.8X HR lens with El-Nikkor in pair  |
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Valued Member
Russian Federation
172 Posts |
Moritex with 2.5x TV extender from 65mm. No crop and stack.  |
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Pillar of the Community
United States
4038 Posts |
Interesting lens combos and results. I'd be interested in hearing more about them, but this is probably not the forum for those discussions. Can you post these over on the Photomacrography Equipment forum? There are several folks over there who are very interested in these combo lens applications, and have been doing similar work.
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Valued Member
Russian Federation
172 Posts |
You are correct Ray. There is better place for this. Waiting for invite from admin during registration procedure.
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Valued Member
United States
441 Posts |
Post a link here when you get a thread going at the Photomacrography Equipment forum...Andrew
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Valued Member
Russian Federation
172 Posts |
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Valued Member
United States
441 Posts |
Thanks for the info justwalking. How about some pics of your setup with this lens? How does it do with coins relative to depth of field, working distance, etc? Thanks.
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Replies: 73 / Views: 17,028 |
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Posted 11/19/2017 9:00 pm
