Search found 34 matches

by Blcak
Thu Jun 06, 2013 9:31 am
Forum: Equipment Discussions
Topic: Coated clear-glass-filter *behind* older optics for digital?
Replies: 2
Views: 964

Coated clear-glass-filter *behind* older optics for digital?

I just had this idea, certainly not new, I'm not even sure about my premises, but let me sketch it out: Premise 1: I've read that new, "digital optimized" lenses have a specially coated back element to mitigate reflection effects by the sensor. Premise 2: I doubt many of the enlarger lenses in use f...
by Blcak
Sat Dec 29, 2012 7:53 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: LSD for macro photographers (high-tech diffusion material)
Replies: 46
Views: 21184

Are microlens arrays really "expensive"? I've not been able to find a price. I'll contact a distributor to find out, but that'll take a while these days. Will they ship a sample to non-company people? I had no trouble ordering a sample as a 'non-company' consumer. With "sample" I meant larger sheets...
by Blcak
Fri Dec 28, 2012 10:25 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: LSD for macro photographers (high-tech diffusion material)
Replies: 46
Views: 21184

The 80° one looks amazingly even.
Is there a source for larger sheets?

Edit: I've used the 40°*0.2° ;)

Edit2: the 30° might be a better choice for larger sheets + flash, I guess?
Hm.

Will they ship a sample to non-company people?
by Blcak
Fri Dec 28, 2012 2:39 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: LSD for macro photographers (high-tech diffusion material)
Replies: 46
Views: 21184

I've tried an LCD-diffusor, which unfortunately resulted in a linear pattern. Crossing two sheets at 90° resulted in a round pattern, but also reduced the light quite a bit.

I wonder if there's a source for "normal" diffusion at good sizes. Could be very promising for light diffusion in the field.
by Blcak
Tue Jul 10, 2012 8:05 am
Forum: Beginners Macro
Topic: Beyond 1x - is Canon MP-E 65mm the right choice for me?
Replies: 13
Views: 3900

That's effective f/52 on an APS-sized sensor -- so deep into diffraction territory that his 10 MP camera is actually acting more like 1.5 MP. But the result works great. Yes, it would be fuzzy at actual pixels and full camera resolution, but it's still sharp enough to capture the ommatidia of the e...
by Blcak
Mon Jul 09, 2012 7:52 am
Forum: Beginners Macro
Topic: Beyond 1x - is Canon MP-E 65mm the right choice for me?
Replies: 13
Views: 3900

One thing I dislike about it: The aperture isn't that nicely shaped, so the out of focus blur can look a bit nasty at times. But that's hard to produce at these magnifications ;). Edit: Found a picture on flickr by someone else which shows it: http://www.flickr.com/photos/naadodi/6617779097/ Canon s...
by Blcak
Mon Jul 09, 2012 2:24 am
Forum: General Discussion Forum and Community Announcements
Topic: Euryplatea nanaknihali, world's smallest fly
Replies: 11
Views: 2024

With such a small creature, how on earth would one photograph it in the field? I don't see how a person could see one except by accident while photographing something else. While they're asleep, I guess. Springtails aren't easy to photograph, either, but there are photos of them. Alternatively, one...
by Blcak
Tue Jul 03, 2012 9:09 am
Forum: General Discussion Forum and Community Announcements
Topic: Euryplatea nanaknihali, world's smallest fly
Replies: 11
Views: 2024

I've read about it, too. They should send a sample to one of you guys so you can make some high magnification stacks of that bug.
by Blcak
Tue Jul 03, 2012 7:09 am
Forum: Equipment Discussions
Topic: Minolta Compact Bellows -- not exactly light tight.
Replies: 8
Views: 1646

I did some reading in the world of large format photography.

Plasti Dip has been mentioned once with good results.
Other people generally seem to prefer acrylic paint.

I think I'll give Plasti Dip a try, why not.
by Blcak
Mon Jul 02, 2012 12:40 am
Forum: Equipment Discussions
Topic: Minolta Compact Bellows -- not exactly light tight.
Replies: 8
Views: 1646

A spray can of 'Plasti Dip Flexible Rubber Aerosol' may be useful in this situation. I haven't used the product but made a note of it when it crossed my path. Apply gradually in very thin layers. Some people are painting their cars with this stuff...plenty of videos on YouTube. *Use at your own dis...
by Blcak
Sun Jul 01, 2012 9:28 am
Forum: Equipment Discussions
Topic: Minolta Compact Bellows -- not exactly light tight.
Replies: 8
Views: 1646

To clarify, there are no specific leaks, those I could fix easily with a bit of tape. The whole bellows material is not 100% light tight. It's a bit translucent.
It's that way with both of them, so it's very likely a design flaw affecting all of them.
by Blcak
Sun Jul 01, 2012 8:04 am
Forum: Equipment Discussions
Topic: Minolta Compact Bellows -- not exactly light tight.
Replies: 8
Views: 1646

Minolta Compact Bellows -- not exactly light tight.

Hi, I got two of these compact and lightweight bellows on eBay and managed to adapt one of them to M39 which I can use on any bayonet. At the other side I use a simple MD>M39 adapter. A picture can be found here: http://www.flickr.com/photos/70078248@N00/4504239200/ (not my flickr page). I had plann...
by Blcak
Sun Jun 24, 2012 2:08 pm
Forum: Equipment Discussions
Topic: Graslon Diffuser for macro ??
Replies: 4
Views: 1473

They seem to be using the LSD-type diffusor that has been discussed in this forum already:
http://www.photomacrography.net/forum/v ... p?p=109325
by Blcak
Thu Jun 21, 2012 8:37 am
Forum: Equipment Discussions
Topic: Membership JML 20X Purchase
Replies: 108
Views: 17519

It's here, nicely packed. Thank you Richard! :)
by Blcak
Wed Jun 20, 2012 4:23 am
Forum: Equipment Discussions
Topic: Membership JML 20X Purchase
Replies: 108
Views: 17519

Nor the UK ones. Sometimes it takes weeks from the US. No idea why, or if the delay is in the UK or US. Nothing's ever been opened. Mine neither. It's usually customs that takes forever in my experience. My order from HK has arrived after two months, the one before took two weeks. Only difference w...