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A quick look into the Natural History Museum

 
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ChrisR
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Joined: 14 Mar 2009
Posts: 8231
Location: Near London, UK

PostPosted: Wed Mar 13, 2019 10:00 am    Post subject: A quick look into the Natural History Museum Reply with quote

...found Mitutoyo 5x and 10x objectives being used on one of these as a "tube" lens.
The actual lens shown was getting sloppy so it was replaced with the later model, whose box is shown, with no apparent change in image quality. Surprisingly to me they only vignette on APS at about 135mm. Though it's quite strongly, bugs don't tend to have square corners. 135 to 300 is of course a very good range



Cameras are Canon APS such as 750D or 800D, which last about 10 months, then they are replaced under warranty. One subsequent dead shutter was replaced for £120.

This operator was running 50 stacks a day of tiny wasps, all new to science. 2000 species to go.


To me the quality looked good enough.
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abednego1995



Joined: 01 Nov 2016
Posts: 46

PostPosted: Thu Mar 14, 2019 3:24 am    Post subject: Reply with quote

Great info, the BMNH?

Professional focus stackers must eat into profits of those camera makers!
Another piece of evidence to go after electronic shutters for this kind of work...
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iconoclastica



Joined: 25 Jun 2016
Posts: 159
Location: Wageningen, Gelderland

PostPosted: Mon Mar 18, 2019 4:09 pm    Post subject: Reply with quote

The 75-200 behaves the same at 135mm. The zoom-length is recorded in the exif, so even when you're careless the magnification still can be reconstructed.

Weird critter, that wasp!

Wim
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