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Using a 38mm Biogon / Lamegon design lens
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PostPosted: Sat Oct 22, 2011 3:58 pm    Post subject: Reply with quote
No correction Dan, just some added info.


PostPosted: Sat Oct 22, 2011 4:14 pm    Post subject: Reply with quote
danfromm wrote:
Orio wrote:
Quote:
Lamegon

The Thiele book lists only 317 Lamegons ever made!
Are you sure? I ask not because I know better but because Charlie Barringer had four SMK-120s, i.e., eight 55/5.6 Lamegons. He occasionally came close to getting most or all examples of a rare lens but was confident that there were many more SMK-120s.


I am sure that the Thiele book lists only 317 Lamegons.
Whether this information is correct, I can not know.
Also this number would not include lenses with a name other than Lamegon that use the same optical design.


PostPosted: Sat Oct 22, 2011 5:43 pm    Post subject: Reply with quote
Took a walk to catch the last golden sunrays today, so here a few shots taken with that lens and my Lumix GH1...






















If you want my opinion about it: a slow lens but with very high resolution + contrast and very low distortion. Any next time I even have a hood constructed for it Wink

The whole set is here: http://www.flickr.com/photos/kds315/sets/72157627938810434/


PostPosted: Sat Oct 22, 2011 6:04 pm    Post subject: Reply with quote
Well, there are more "resolution test images", so I'll rather separate them:







well, it clearly shows what it once was designed for, reproduce details to specialized film capable of resolving up to 1000 lpm.


PostPosted: Sat Oct 22, 2011 6:31 pm    Post subject: Reply with quote
Aha, now I see the quality of this lens, the set is stunningly nice, the original test shots didn't strike me as special, but these show the quality of the lens. I now will look for old microfiche equipment to strip the lenses from!


PostPosted: Sat Oct 22, 2011 7:27 pm    Post subject: Reply with quote
That cannot applied to just "any" micro fiche lenses, I have a lot here that just sit around unused...


PostPosted: Sat Oct 22, 2011 8:55 pm    Post subject: Reply with quote
100kb compression for 1280x980 pix is too much, but I believe that even with less compression and with the best lens it would not be much better, the Lumix give subpar pics


PostPosted: Sat Oct 22, 2011 9:31 pm    Post subject: Reply with quote
(removed)

Last edited by kds315* on Mon Feb 06, 2012 11:47 am; edited 1 time in total


PostPosted: Sat Oct 22, 2011 10:36 pm    Post subject: Reply with quote
kds315* wrote:
That cannot applied to just "any" micro fiche lenses, I have a lot here that just sit around unused...
Absolutely. Fortunately many of them are quite inexpensive.

My best, a $6.00 19.5/3.85 B&L, is competitive with a wide open 16/2.5 Luminar above 20:1. None of the others I've bought was worth bothering with, and they're too small and light to be used as paperweights.


PostPosted: Thu Oct 27, 2011 10:42 pm    Post subject: Reply with quote
Not much distortion I could see:



and darn, what a crisp lens:



and no wonder it was used (still is) as a micro documentation lens:



PostPosted: Thu Oct 27, 2011 11:32 pm    Post subject: Reply with quote
Two thoughts, Klaus.

Distortion is an off-axis aberration. Your sample shots don't have much subject off-axis that would show it clearly.

Lamegons are symmetrical, symmetrical lenses typically have very low distortion. So your news, which I believe even though your examples aren't the best possible, is no surprise and I believe it.


PostPosted: Thu Oct 27, 2011 11:41 pm    Post subject: Reply with quote
Well, it wasn't really set up as "distortion test" shots, so far you're fully correct.
I was just amazed about its performance, so I wanted to share that Wink


PostPosted: Fri Oct 28, 2011 6:56 pm    Post subject: Reply with quote
close up performance



Also here, no complaints from my side Wink


PostPosted: Fri Oct 28, 2011 9:59 pm    Post subject: Reply with quote
Shocked Shocked amazing, like a macro lens!


PostPosted: Fri Oct 28, 2011 11:28 pm    Post subject: Reply with quote
Should be, as it was computed once as a high resolution lens for micro documentation with up to 400lpm. That performamce I had expected, but was surprised how well it did also at infinity!


PostPosted: Fri Oct 28, 2011 11:48 pm    Post subject: Reply with quote
kds315* wrote:
Should be, as it was computed once as a high resolution lens for micro documentation with up to 400lpm.


Right, I had forgotten that.


PostPosted: Mon Oct 31, 2011 7:17 pm    Post subject: Reply with quote
a story of the late autumn light, told in a few pictures...
























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