Search found 187 matches

by Peter M. Macdonald
Fri Jun 28, 2019 3:44 am
Forum: Equipment Discussions
Topic: 135mm EL Tube Lens Test Suggestions
Replies: 18
Views: 2882

Robert, I cannot help with your question, but it sure is good to see that you are back online asking it.
by Peter M. Macdonald
Fri Jun 28, 2019 3:42 am
Forum: General Discussion Forum and Community Announcements
Topic: Exhibition in Edinburgh
Replies: 0
Views: 1769

Exhibition in Edinburgh

For those of you who will be in Edinburgh this summer, you may wish to visit the new Levon Biss exhibition entitled Microsculptures. I was lucky enough to be at the preview yesterday evening. The exhibition opens tomorrow and will run until September. It is in Inverleith House, within the Royal Bota...
by Peter M. Macdonald
Sun Jun 23, 2019 1:04 pm
Forum: General Discussion Forum and Community Announcements
Topic: Robert OToole
Replies: 31
Views: 9965

That is good news. When you are fit enough to read this Robert, all my best wishes for your health.
by Peter M. Macdonald
Sat Jun 22, 2019 2:01 am
Forum: General Discussion Forum and Community Announcements
Topic: Robert OToole
Replies: 31
Views: 9965

Delighted that Robert is on the mend. Let us all hope that his recovery continues.
by Peter M. Macdonald
Thu Jun 20, 2019 3:04 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Optical aberration or a possible stack artifact?
Replies: 19
Views: 6520

It is a simple matter to try immersing the amber in fluid to see if Enrico is correct. I rather suspect that he is. The easiest and cheapest liquid with a very similar refractive index to amber, at least here in the UK, is to use Johnson and Johnson Baby Oil. The citrus scented version is quite plea...
by Peter M. Macdonald
Sun Jan 20, 2019 4:42 am
Forum: Equipment Discussions
Topic: Minimum size of optical breadboard
Replies: 34
Views: 10241

Mawyatt,

even if you have to use inkject output, just take the output to the local copy shop and get a photocopy of it. Normal photocopiers use the same process as laser printers.

Peter
by Peter M. Macdonald
Sat Jan 19, 2019 5:49 am
Forum: Equipment Discussions
Topic: Minimum size of optical breadboard
Replies: 34
Views: 10241

Chris,

Interesting to know that acetone can be used as a transfer for a laser print.

Like your idea of labeling the holes with their drill sizes.

Peter
by Peter M. Macdonald
Fri Jan 18, 2019 2:49 pm
Forum: Equipment Discussions
Topic: Minimum size of optical breadboard
Replies: 34
Views: 10241

Laying out for hole punching and drilling using scribes can be difficult. It is often easier to do the layout on a computer first. This can be in any software which allows the precise placing of small dots at the centres of the desired drilling positions. Then print out, either on large sticky label...
by Peter M. Macdonald
Sat Dec 29, 2018 7:34 am
Forum: Photography Through the Microscope
Topic: Diatoms and Radiolarians
Replies: 14
Views: 4195

Robert, these are lovely. I always like good darkfield pictures of radiolarian.

Are your samples from Germany coming from a commercial source?
by Peter M. Macdonald
Sun Dec 02, 2018 2:17 pm
Forum: Equipment Discussions
Topic: Easy to use setup for photographing with Leitz microscope?
Replies: 24
Views: 9514

I am away from home for a few days at the moment, so do not have access to scope or adaptor. However, when I got it there was a Leica bayonet adaptor attached at the camera end. I took it off and replaced it with a cheap T2 Canon adaptor. I assume that is why there is a small amount of adjustment bu...
by Peter M. Macdonald
Sun Dec 02, 2018 9:53 am
Forum: Equipment Discussions
Topic: Easy to use setup for photographing with Leitz microscope?
Replies: 24
Views: 9514

That is the adaptor which I have. It looks as though it has lived a bit. May be as well to make sure that you can return it in the event that the optics are as beaten up as the paint. You will see in the first of the six pictures on ebay that there is a spherical knob on a small slider. This seems t...
by Peter M. Macdonald
Sat Nov 24, 2018 3:45 pm
Forum: Equipment Discussions
Topic: Easy to use setup for photographing with Leitz microscope?
Replies: 24
Views: 9514

Another way to adapt a Leitz microscope to a camera would be to get hold of a Leitz microscope adaptor. These come up on ebay from time to time and are usually not very expensive - c £100. http://www.photomacrography.net/forum/userpix/637__MM07196_1.jpg This was the way in which Leitz intended for 3...
by Peter M. Macdonald
Sat May 26, 2018 3:26 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: A yellow fly...
Replies: 2
Views: 1403

Lovely picture from you as usual. If you post it at https://diptera.info/forum/ someone will tell you the fly's identity.
by Peter M. Macdonald
Wed Mar 28, 2018 2:08 am
Forum: Photography Through the Microscope
Topic: Photo quiz-image added
Replies: 21
Views: 5636

Clearly an organic structure with regularly repeating units meaning that we are looking at a colonial animal. That lowers the possible cast to bryozoan and corals. The series of vertical scratches suggests that this is a fossil specimen which has been polished, but the fine polishing has not been ta...
by Peter M. Macdonald
Sun Oct 15, 2017 8:54 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Lighting for macro photography of fern gametophytes
Replies: 600
Views: 159871

Jen,

I am glad that your long journey seems to have reached a satisfactory destination. Well done for persevering.

Peter