Search found 36 matches

by barnack-bill
Mon Apr 16, 2018 10:49 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Left Clicking
Replies: 7
Views: 2436

I agree though on investigation I think the Wemacro shutter switch is a pair of clean contacts from a physical pcb relay and the body of the jack plug should be called 'common' rather than 'ground'.
by barnack-bill
Sun Apr 15, 2018 2:07 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Left Clicking
Replies: 7
Views: 2436

I don't see why not. The connections to the jack plug are body = earth (ground); ring (autofocus) not used, earthed within controller; tip = switch wire.

At your own risk if you try it!
by barnack-bill
Sun Apr 15, 2018 11:32 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Left Clicking
Replies: 7
Views: 2436

Left Clicking

I recently bought a wemacro rail which works well with my Sony camera but was a bit inconvenient with my digital microscope. The digital microscope software takes a picture when a screen button is clicked. I found that this tended to cause vibration, better if I could stand away from the table . Als...
by barnack-bill
Mon Oct 31, 2016 8:32 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Apple tree lichen
Replies: 0
Views: 507

Apple tree lichen

1:1 macro using Medical Nikkor 200mm f5,6 on Sony A7. I had no idea of the species, just thought it made an interesting picture. Looking at an 'idiot's guide' subsequently I think yellow one is Cushion Xanthoria. The other grayish green one may be Flavoparmelia but not so easy to identify. Correctio...
by barnack-bill
Mon Oct 10, 2016 5:11 am
Forum: Equipment Discussions
Topic: Anyone knows what is the thread size?
Replies: 3
Views: 469

Lee, I apologize for the crazy Imperial (English) system of measurements... metric is much better! The apology is a bit rich coming from an American considering that this is a UNC thread, basically an American standard. The UTS is currently controlled by ASME/ANSI in the United States The English s...
by barnack-bill
Thu Aug 11, 2016 2:27 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Stereo Macro introduction
Replies: 3
Views: 1089

Stereo Macro introduction

This is reposted from Talk Photography and I am sure many here will have in depth knowledge of the process but I hope that some of you find it interesting. I have played with stereo on and off for some years and built various twin camera and sliding rigs but only very recently started trying macro s...
by barnack-bill
Thu Jul 07, 2016 1:32 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Cork (stereo)
Replies: 4
Views: 800

The stereo image is quite interesting. I couldn't quite resolve it by 'free viewing' as I often can see stereo images but I printed as a stereo card and seen through a viewer it shows up quite well though not in really high relief.

I suppose you view it through a stereo microscope.
by barnack-bill
Sat Jun 25, 2016 3:49 am
Forum: Equipment Discussions
Topic: DYI lighting
Replies: 4
Views: 981

You might find it worth scrolling through this long thread on Talk Photography. Lots of weird and wonderful examples there of home made light guides and diffusers. This post uses a Pringles tube, though flavour is not specified Forum link https://www.talkphotography.co.uk/threads/show-us-your-macro-...
by barnack-bill
Sat Jun 18, 2016 8:28 am
Forum: Equipment Discussions
Topic: Motorized bellows
Replies: 45
Views: 14597

Re: Motorized bellows

On this first try and from my limited experience I couldn't judge whether better or worse but it was noticeably easier to stage and light as there were no moving parts (rails or lenses) near the subject. It seems to me that this improvement is due to reversing the bellows, not to focusing by rear e...
by barnack-bill
Fri Jun 17, 2016 1:21 pm
Forum: Equipment Discussions
Topic: Motorized bellows
Replies: 45
Views: 14597

I'm very taken by this idea and since my very basic rig was set up I had a quick play. http://www.photomacrography.net/forum/userpix/5566_A7_201709_1.jpg I reversed the bellows completely so the rails came back under the camera and because the weight distribution was all wrong I added a makeshift re...
by barnack-bill
Fri Jun 17, 2016 12:44 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Using a lathe
Replies: 8
Views: 1975

Now that's a proper lathe!
by barnack-bill
Fri Jun 17, 2016 12:32 am
Forum: Equipment Discussions
Topic: Motorized bellows
Replies: 45
Views: 14597

This sounds easy to implement on a trial basis moving the bellows manually. Have you done this and how well did it work?

I'm watching this thread with interest as it would be easy enough to fix a stepper motor to the bellows adjustment and set variable steps on an arduino driving the motor.
by barnack-bill
Tue Jun 07, 2016 2:16 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Focus stacking by focus ring
Replies: 4
Views: 1965

Rik, thank you. I had seen the link in another post which is what prompted me to raise the subject here, particularly with flower/butterfly applications in mind. The advice you both have given is appreciated. I'm a Sony user so clever focusing programs are not available. Depending on the lens I may ...
by barnack-bill
Sun Jun 05, 2016 1:31 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Focus stacking by focus ring
Replies: 4
Views: 1965

Focus stacking by focus ring

I understand that this is preferred over using a rail but how do you determine the steps to get regular spacing? Most focus rings have a non linear (logarithmic?) scale and focus by wire lenses follow some complex rule in which focus change depends on speed of focus ring adjustment as well as absolu...
by barnack-bill
Tue May 24, 2016 12:49 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Using a lathe
Replies: 8
Views: 1975

An ML-7 :smt007 ? Well spotted Sir! Dates from 1957 I think You could easily do some stitching with the cross-slide. With the chuck as well, if the aligning tool could twist the frames about! Hmm - possibly engage the lead screw, put the camera on fast continuous and do some automatic focus stackin...