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High definition photo

Posted by Account Closed  
Re: High definition photo
March 27, 2012 07:52PM
I'm working about the second generation of these photographs. Quality and sharpness is better (really). I have now two lens tube.... Result tonight for the first construction.
Re: High definition photo
March 27, 2012 09:51PM
avatar Re: High definition photo
March 30, 2012 04:20PM

Your persistence has been richly rewarded and your last contribution is simply superb! Keep up the good work and please post your future results, as I'm sure they will be of interest to all who follow this topic.

Re: High definition photo
March 30, 2012 05:46PM
Hm, I wonder. 11mm FOV with a 4X objective means that the extension (tube length) must be very short. What kind of tube lens (focal length) did you use for that last azurite photo?
If I use a 5X objective with my tube lens (focal length 200mm) at an extension of 160mm I get a FOV of ca. 7 mm. Anything much shorter than that and the image suffers from vignetting and loss of resolution, especially in the corners. Ideally, for a 4X objective, I would expect a FOV of about 8mm for peak performance.
I know that the Nikon CFI Plans have quite a tolerance for extensions deviating from the design length and the problems that might occur are difficult to judge in your image because the in-focus parts are rather centered.

It would be interesting if you could make a photo with identical set-up but choosing a specimen with much finer detail that covers the entire frame. This would really reveal any short-comings.



Edited 1 time(s). Last edit at 03/30/2012 05:51PM by Harald Schillhammer.
Re: High definition photo
March 30, 2012 07:52PM
11 mm with 4 images. I work with a panoramic tehnic. With my 100 mm tube lens, maximal FOV is 6 mm with my system.

I try with my 2x objective (new ! Find in china.... less expensive than mitutoyo but i can said result seems very good).

Result fastly.

Thanks for all Gene and everybody !

Edited 1 time(s). Last edit at 03/30/2012 07:53PM by Frédéric Hède.
Re: High definition photo
March 31, 2012 08:05AM
Ah yes, I'm sorry. I didn't take the panorama into account.

Re: High definition photo
March 31, 2012 10:20AM
Thank you, Frederic. It’s always a great enjoyment to make a journey through the crystal landscape.

Uwe Ludwig
Re: High definition photo
April 15, 2012 12:31AM
Re: High definition photo
April 29, 2012 05:54PM
I use this technic often now.

An other example here :

small image and a link for the big

Big image here

Edited 1 time(s). Last edit at 04/29/2012 05:54PM by Frédéric Hède.
avatar Re: High definition photo
April 30, 2012 03:12AM
When you know the localities pretty much for sure you should consider uploading them to our general gallery where they won't get buried under all the new message board entries that will eventually bury them.

Rock Currier
Crystals not pistols.
Re: High definition photo
May 09, 2012 01:23PM

most of them are on mindat.

This specimen have been built with panoramic technic, she is small here but quality is very high.... Click on and quality is better but far of the original.

Edited 2 time(s). Last edit at 05/09/2012 01:25PM by Frédéric Hède.
Re: High definition photo
June 28, 2012 05:27PM
And last.... this compilation is a 100 Mpixel photo. Good trip :). Size is 60 mm of FOV

A trip in a small world
avatar Re: High definition photo
June 29, 2012 08:51AM
Stunning images Frédéric. Please post more, magnificent work!

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