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Old October 5th, 2007, 08:40 PM   #16
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it is unbelievable...
there is not a grain, no vignette, no distortion, no aberrations, very sharply!
Matteo, many THANX :)
Mamiya 645/80/2.8 => 63mm => wax GG => 12mm => PCX Lens D70/FL67 [)=> 66mm => HV20
a very good bokeh.
I would like to thank Wayne and Dennis for their reports

Last edited by Svyatoslav Pylypchuk; October 5th, 2007 at 10:43 PM.
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Old October 6th, 2007, 09:12 AM   #17
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:-) you're welcome

post some good result!
I'm waiting for the beeswax
I've already got the pure paraffin to make the alloy 9/10paraffin +1/10beeswax
like you told me

so many thanks you too
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Old October 8th, 2007, 12:23 PM   #18
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It is the not last version of my adapter, but "coming soon".
I specially left edges in sight
http://rapidshare.com/files/61138040/belog2.mov
http://rapidshare.com/files/61138041/belog3.mov
http://rapidshare.com/files/61138042/belog4.mov
It is very difficult to catch a sharpness without an additional monitor.
2.8 for a medium lens, it that 1.4 for 35mm
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Old October 9th, 2007, 03:17 AM   #19
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we're on the right way! awesome result and with a static adapter!
very good!
one question: I've see that the melting point of the paraffin is 50 more or less
did you encounter some trouble? using it in a close box!? (the adapter?)
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Old October 9th, 2007, 04:31 AM   #20
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I am sure that it is a not problem. when you will do an alloy in practice, you will understand, what high temperature is needed for melting. Although, if you will create such environment, your camcorder will break too :)
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Old October 11th, 2007, 03:37 AM   #21
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Hi Svyatoslav any news!?
I've seen that to be perfect the image is sharp from corner to corner, in the center is ok but in the corner there a little purple chroma aberration
have you solved it in the final release?
I think that cause the bigger image of a medium format lens on the gg we need an achromat instead a condenser!
I have taken lenses from http://www.surplusshed.com/
and http://www.anchoroptics.com/catalog/product.cfm?id=257
but for achromat the larger they have in stock is D60 F136.5
did you think is enough D60 or we need D70 lens?
did you know a cheaper lens seller?
:-)
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Old October 11th, 2007, 03:56 AM   #22
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The achromat from dennis wood, at 72mm in diameter, solved my problems with soft edges and chromatic abberation. I also use it with my mid format adapter using mamiya 645 lenses. The set up is usually ok with 80mm f1.9 and 150mm/ With the wider 45mm there is a slight vignette which will disappear when you slightly adjust your zoom. I suggest you go for |Dennis wood's high grade achromat.

Ted
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Old October 11th, 2007, 04:20 AM   #23
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Ted did you use the dennis wood's achromat in front of the camera lens
or like I suggest?
Mamiya 645/80/2.8 => 63mm => wax GG => space => Achromat Lens [)=> space => HV20 (camera)
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Old October 11th, 2007, 09:33 AM   #24
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Quote:
Originally Posted by Svyatoslav Pylypchuk View Post
I expended about 3 months in experiments with different waxes. A lots of attempts. The best is an alloy of paraffin and beeswax 9:1. The pure paraffin is for a sale in a pharmacy. I purchased a beeswax here:
http://www.onestopcandle.com/Merchan...tegory_Code=CA
Would you able to explain how you go about making a Wax based GG? A tutorial perhaps?
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Old October 11th, 2007, 12:57 PM   #25
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:))) Matteo, I already got this achromat from Surplusshed, but did not yet test.
It seems to me, that it stands not nearly expensive, as compared to other.
I buy some lenses here www.anchoroptics.com (I tested their diffusion films and glasses - very bad).
I was most disturbed by vignetting and sharpness. Condenser worked out these problems.
You are right, aberration is on edges and I showed them specially. But I planned to avoid them, simply doing zoom.
It is balance: if to approach a condenser to gg, less aberration, but anymore barrel distortion. And vice versa.
Practically I plan to utillize an adapter for commercials on broadcasting tv and musical clips on dvd. It's only PAL: 720x576 4:2:0 and my adapter fully arranges me. But, I would like to do an adapter better, than Movietube. I think it is real, as they use an static adapter gg24x18mm and complicated flip-system.
If I will be able to clean corner aberrations, it will be ideal adapter :) And I'll shoot via HDMI 4:2:2 http://www.dvinfo.net/conf/showthread.php?t=104431. I do supporting rails and own system of remote Follow Focus now.

Thanx, Ted. Achromat is simply high-quality magnification lens. May be it simply increases central part, where are not distortions? Achromat is not needed in an mid lens adapter as magnification lens.
If achromat is a good condenser, I will use it certainly .

Louis, unfortunately, I do not know English so well, clearly to explain.
I used two new photo filters Marumi 82mm (I experimented with old filters 67mm).
Gaskets from cook foil in four places.
Glasses must be very clean. We lay them in a pan and sprinkle with a wax. Heating is needed very fluently. The basic problem is bubbles. We delete their by shaking.

Last edited by Svyatoslav Pylypchuk; October 11th, 2007 at 04:16 PM.
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Old October 12th, 2007, 02:57 AM   #26
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Matteo,

In my setup, the achromat sits between the camera lens and the ground glass.
The mid format lens cast a big image already on the gg, i set my zoom distance in order for me to pick up the gg image that measures 36mm by 24mm.
This is the optimum size for most of my lenses. A larger image size will show vignette on the corners. for my wider lens ther is a slight, negligible for me, vignette.
The mamiya lens to gg distance is exactly the same flange depth as if it were on the mamiya body. I can use the focus distance markings on the lens accurately.

Ted
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Old October 12th, 2007, 04:30 AM   #27
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Thanks Ted and Svyatoslav
-Louis take a look at this tutorial http://members.chello.nl/a.schultzev...nburg/wax3.htm
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Old October 12th, 2007, 05:06 AM   #28
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Svyatoslav,

I have experimented from magnifying lens to macros, close-up filters before finally deciding on an achromat.
Without an achromat the camera lens will have to move so far back to to focus on the gg. with close up and macros i was able to shorten the length of the setup but the chromatic abberation on the sides of the image(purple and green fringe) is exaggerated. the achromat acts as a close up but also corrects the CA.
Eventually your experimentation will lead you to this conclusion.

Ted

threads on my adapter are here

http://www.dvinfo.net/conf/showthread.php?t=62837

http://www.dvinfo.net/conf/showthread.php?t=102779

hope this helps to shorten your process.
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Old October 12th, 2007, 08:24 PM   #29
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I appreciate your efforts to explain the process.You results are impressive.The most natural looking adapter I've seen yet.

Quote:
Originally Posted by Matteo Pozzi View Post
Thanks Ted and Svyatoslav
-Louis take a look at this tutorial http://members.chello.nl/a.schultzev...nburg/wax3.htm


Thanks Matteo
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Old October 13th, 2007, 05:48 AM   #30
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Thanx. I can not write tutorial, but if you will do such adapter, I will in detail answer your questions. Possibly you will do better and will tell me :)

While the small problem of aberration remains. The use of achromat does not help. Achromat well operates as a close-up lens, but does not work as a condenser.
It may be necessary to utillize other. I can not find achromat like D70-80mm and FL60-70mm.
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