Search found 272 matches

by All Ex
Tue Jul 07, 2020 11:33 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Equations
Replies: 3
Views: 306

Re: Equations

In my aims, it is highly possible to play an important role except for the equations the lists containing step sizes too, beyond the list in Zereene Stacker & the Weelmacro one do anybody has in mind any other one? Rik, the second equation is the base of Johan J Ingles-Le Nobel calculator if I recal...
by All Ex
Tue Jul 07, 2020 2:21 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Equations
Replies: 3
Views: 306

Equations

I am at the starting of a very ambitious project that might take me a lot of time and effort. The only thing I want from you is to contribute your methods/equations/formulas you use to estimate : The magnification The step size Also the DOF ones [if you believe that applies in our kind of microphoto...
by All Ex
Wed May 20, 2020 11:11 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Question about capturing small insects
Replies: 3
Views: 578

I wasn`t informed for your answer Pau, it`s a good idea to leave an aple and once fruit flyes appear to encapsulate over it whith a glass vase in which I`ve firstly put a piece of cotton, with alcohol or acetone, to anesthetize them before the all shooting process.
:smt117

Thanks.
by All Ex
Sun May 17, 2020 6:40 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Question about capturing small insects
Replies: 3
Views: 578

Question about capturing small insects

Almost all of us have seen the fruit fly portrait in Zereen`s site, where they sow us how to retouch hairs using Zereen`s features. I have the rig but I wonder how they could be able to catch and handle such a small subject. The irony is that, due to the COVID 19, nobody is allowed to come close to ...
by All Ex
Wed Jan 01, 2020 4:44 am
Forum: Equipment Discussions
Topic: Sigma life size atachment as a tube lens ?
Replies: 2
Views: 376

It`s been a happy reply from you Pau, have a nice year. It is this exact site I`m watching for a Long time now, I am very pleased to find out from him that Rik`s suggestions on the two Raynoxes are amongst the top-rated ones. It`s been a pleasure to know that this set-up will work. with more to come...
by All Ex
Wed Jan 01, 2020 2:32 am
Forum: Equipment Discussions
Topic: Sigma life size atachment as a tube lens ?
Replies: 2
Views: 376

Sigma life size atachment as a tube lens ?

Do you think it will work in an M42 rig? I found this in the net ; http://www.photomacrography.net/forum/userpix/5216_Annotation_20200101_110045_1.jpg I have the "life-size attachment" and the adaptors to reduce the diameter of it from M52 to M42. I assume that since I`ll be using less from the diam...
by All Ex
Mon Apr 22, 2019 12:49 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: A question about combining methods of macro
Replies: 0
Views: 1934

A question about combining methods of macro

I wonder if I place a lens reversed and exactly at its working distance, I attach an objective, would the reversed lens act like an eyepiece to the objective. I mean will the magnification of the reversed lens multiply the objective's one?
:?:
by All Ex
Sat Feb 02, 2019 1:54 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Question Abought UV light.
Replies: 8
Views: 3177

Thanks Pau.
Have a nice weekend.
by All Ex
Sat Feb 02, 2019 1:21 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Question Abought UV light.
Replies: 8
Views: 3177

A more promising application is to put a filter over the lens to cut that violet light (light yellow usually would do) for detecting the fluorescence of the sample. I suppose you mean to put a yellow filter behind my objective otherwise how can I interfere a filter between a microscope objective an...
by All Ex
Fri Feb 01, 2019 12:05 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Question Abought UV light.
Replies: 8
Views: 3177

Pau, we are posting at the same time. I know the danger, so I`m enclosing it in a pipe sliced as to light only the specimen. Inside the pipe, I'll place a metal sheet for reflection towards the specimen and for protection towards me. I don`t think the reflection on the specimen would have enough pow...
by All Ex
Fri Feb 01, 2019 11:47 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Question Abought UV light.
Replies: 8
Views: 3177

My objectives would be UV ones but my tubes won't.
by All Ex
Fri Feb 01, 2019 11:24 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Question Abought UV light.
Replies: 8
Views: 3177

Question Abought UV light.

Does anybody know if the UV light will harm my sensor?
I don`t expect to take advantage of the UV light as I don`t have the proper sensor since I have thought a 375 nm lamp, I`m thinking to experiment with some affordable lenses.
by All Ex
Mon Oct 22, 2018 6:47 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: The same issue. (solved)
Replies: 39
Views: 12533

The problem solved by sending the controller to the States.
it was an issue of its software, sometime during my struggle to make it work, I installed a false one.
:smt023
by All Ex
Mon Jun 04, 2018 12:25 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: eyes
Replies: 21
Views: 4207

Adalbert do you use any big surface for diffusion?
by All Ex
Sun Jun 03, 2018 11:29 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Raynox (150 & 250 - DCR) apperture.
Replies: 6
Views: 1178

As always Rik I thank you. In a previous thread of mine, I`ve got, more or less, the same answer of you. The information though you gave me is valuable. I think it worth the thread. Have a nice day. :smt039 P.S. in your formula, I noticed, that the better is the objective (bigger NA) more stacks are...