Search found 596 matches

by dmillard
Wed Nov 12, 2008 5:40 am
Forum: Equipment Discussions
Topic: Speedlight in the fiber optic illuminator?
Replies: 18
Views: 5045

So it doesn't appear to collimate light, when configured for flash output - it just employs the properties of the mirror? Interesting. Which speedlight do you normally use with it and what would be an average flash output duration 1/4, 1/8th, 1/16th? Craig Hello Craig - I originally used it in TTL ...
by dmillard
Wed Nov 12, 2008 3:10 am
Forum: Equipment Discussions
Topic: Speedlight in the fiber optic illuminator?
Replies: 18
Views: 5045

In regard to the Novoflex solution....There must be a right-angle prism or beam bender in there somewhere? Craig The Novoflex Macro Light has a front surface mirror that rests against the ceiling of the housing when the halogen lamp is in operation, providing a clear path from this source to the fi...
by dmillard
Sun Nov 09, 2008 2:33 pm
Forum: Equipment Discussions
Topic: Nikon Plan 10 / 0.30 - DOF and using it
Replies: 12
Views: 2901

AndrewC wrote:Do you know a way of tracking a lens from it's serial number (114679) because that is clearly legible ?

Nikon presumably know but so far have not responded.

Andrew
Hello Andrew -

I have two of the Nikon CF Plan 10/0.30 objectives; they have serial numbers 214046 and 212241.

David
by dmillard
Sat Nov 08, 2008 3:25 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Cremaster of Monarch butterfly pupa
Replies: 32
Views: 30282

Wonderful shot (apart from any lighting challenges)! It demonstrates beautifully the relationship between structure and function.
by dmillard
Sun Nov 02, 2008 6:41 pm
Forum: Equipment Discussions
Topic: Universal Stage
Replies: 23
Views: 19019

The seller says that the unit was made in West Germany. The Opton name was one of the names used by Zeiss EAST Germany before the wall came down. Same folks who use the name aus Jena, the real original Zeiss works that landed in the Soviet zone. Assuming the unit is authentic, the seller is correct...
by dmillard
Tue Oct 07, 2008 6:00 pm
Forum: Equipment Discussions
Topic: Pair of 20/4 ELWD M Plans on eBay
Replies: 13
Views: 2643

Does anyone know, remember, what this lens has sold for in the past; either new or on ebay? Here's a couple of interesting links: http://www.decarraigoptics.com/objectives.htm http://www.buntgrp.com/nikon.htm I picked up an unused 20X ELWD on eBay for about $170, and was so impressed with the image...
by dmillard
Sat Sep 13, 2008 5:33 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Calculating DOF for stacking
Replies: 7
Views: 2056

A useful formula for optically symmetric lenses is: T=2CN(1+m)/(m squared), in which T equals the depth of field in millimeters, C equals the circle of confusion for the format in use (0.02mm for reduced size digital sensors), N equals the f/#, and m equals the degree of magnification. For example, ...
by dmillard
Sun Aug 31, 2008 4:49 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Amazon Ant -new picture added
Replies: 15
Views: 5137

This portrait is superb, Péter!

David
by dmillard
Sun Aug 31, 2008 11:18 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Red Spider Mite
Replies: 13
Views: 4917

Very impressive images Péter!
by dmillard
Sat Aug 30, 2008 2:39 pm
Forum: Equipment Discussions
Topic: Dissection microscope?
Replies: 2
Views: 1316

Dissection microscope?

Can anyone offer some recommendations for an inexpensive but reliable dissecting microscope, to be used for examining/exploring specimens and preparing them for photography? I'll be taking the actual images with a different set-up.

Thanks -
David
by dmillard
Wed Aug 27, 2008 12:15 am
Forum: Equipment Discussions
Topic: stage micrometer
Replies: 4
Views: 1844

ebay would be my suggestion. You could either get a Chinese/India made one, or pay a bit more and get one made in Germany or the US Here and Here are chinese made ones. There are similar ones for $100. The price has popped up. There were no others up at the moment. A friend of mine bought some ster...
by dmillard
Sun Aug 24, 2008 5:57 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Peacock feather
Replies: 4
Views: 2568

Re: Peacock feather

I haven't worked much with subjects like this, and I'm having trouble imagining what's going wrong. Can you say a few more words, and maybe post out some annotated images showing examples where vibrancy and/or detail get lost? --Rik Thanks for asking Rik - I'm losing resolution of detail, when comp...
by dmillard
Thu Aug 21, 2008 5:26 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Ambush Bug Stack
Replies: 14
Views: 4326

Wow Jody! I'm consistently impressed with your technical mastery.

David
by dmillard
Wed Aug 20, 2008 7:36 pm
Forum: Equipment Discussions
Topic: Strobe or flash for insect flight
Replies: 23
Views: 5339

Graham -

Have you seen this site?

http://www.pbase.com/fotoopa

David
by dmillard
Wed Aug 20, 2008 7:08 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: portrait of soldier flies
Replies: 12
Views: 4007

Beautiful eyes on this fly! Excellent job Antonio.