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El-Cheapo lenses  
 

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Pillar of the Community
Austria
1907 Posts
 Posted 08/13/2016  02:12 am  Show Profile   Bookmark this reply Add austrokiwi to your friends list Get a Link to this Reply
This suggestion may not look that cheap. It is not a beginners lens. I am posting it as it is one of the cheapest listings I have seen in a long time( assuming it sells close to the listing price) the buy it now price is at "normal" market level. SChneider Kreuznach APO Componon 40mm F 2,8 HM ( high modulation)


http://www.ebay.at/itm/Schneider-Kr...AOSw9NdXrJZA
Don't buy the book before the coin as too often the book is wrong. "Buy" the story then the coin
Edited by austrokiwi
08/13/2016 02:19 am
Pillar of the Community
Austria
1907 Posts
 Posted 08/14/2016  09:37 am  Show Profile   Bookmark this reply Add austrokiwi to your friends list Get a Link to this Reply
Here is a non lens El Cheapo. If any one is looking at making their own macro stand this seems a very cheap option. Durst Column and mount It looks suitable for mounting a bellows

http://www.ebay.com/itm/Durst-F60-P...AOSwARZXkJ~m
Don't buy the book before the coin as too often the book is wrong. "Buy" the story then the coin
Edited by austrokiwi
08/14/2016 2:11 pm
Valued Member
United States
430 Posts
 Posted 08/14/2016  8:35 pm  Show Profile   Bookmark this reply Add Wizzy1 to your friends list Get a Link to this Reply
What about a fixed aperture Rodenstock Rodagon 80mm lens. Does the fixed aperture limit this lens?
Pillar of the Community
United States
2857 Posts
 Posted 08/14/2016  9:41 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
The Rodagon 80/4 is very good wide open, though f4 is a bit wide, and will force you to stack on smaller coins.

Having a fixed aperture is actually very liberating. No aperture to worry about getting just right. Just shoot to get the best image you can. It may take stacking, but the nice thing about stacking is you are guaranteed the final image is in perfect focus all over.
Contact me for photographic equipment or visit my home page at:
http://macrocoins.com
Valued Member
United States
430 Posts
 Posted 08/27/2016  10:51 am  Show Profile   Bookmark this reply Add Wizzy1 to your friends list Get a Link to this Reply
I have gone on a lens buying binge recently and I have a few questions. First, I bought a vintage SK 80mm 5.6 enlarging lens not realizing it is not a Leica 39mm mount. I know it is 25mm but am unsure of the thread pitch. It is either 1.0 or 0.75 and I don't want to buy the wrong adapter. Does anyone know this?
I have a couple of lenses with illuminated aperture dials. What is the best way to block the light leak from this? Electric tape? Black paint?
I want to start experimenting with reversing the enlarging lenses, but the adapters are around $30 each. Is there a sweet spot for focal length of lenses that are reversed. From what I've read the shorter length lenses (25-50mm) work better. Do 6 element lenses work better than 4 when reversed?
And finally what is the advantage to stacking lenses? Is it to get higher magnifications?
I hope I didn't ruin this thread with all these questions.
Pillar of the Community
United States
2857 Posts
 Posted 08/27/2016  11:30 am  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
Those older enlarging lenses with small mount diameter are exceptionally nice to use because the lens is so small in diameter and does not get in the way of lighting. I have several of these small lenses and they are a joy to use, though tough to adapt! I have an SK Comparon 75mm and an SK Componar 75mm, and both have M25 x 0.5mm threading, so I would guess yours is the same. Compare an M39 with your M25, and if the M25 looks really fine it is 0.5mm. It should be finer looking than a T-mount adapter, which is 0.75mm.

I have found that the illuminated aperture dial issue is a lot of hype. I never block them. I tried it both ways and could not tell the difference. This is mainly because I shoot with wide apertures, such that the amount of light going through the lens is much, much brighter than the light going through the illuminated dial. If you stop down, then it would probably be noticeable. It also may be more noticeable on silver coins than on the copper I shoot. If you do want to block it, I'd suggest black electrician's tape.

Reverse adapters are definitely expensive. You can end up spending quite a bit to cover a range of different thread sizes. The focal length you choose depends on the magnification you're trying for. If you want to do 2-3x, then a 50-75mm works well. For 4-5x, 35mm is good. For higher mags, almost certainly a cheap microscope objective will give better results.

Stacking is a way to avoid using bellows. Depending on the lens used as objective, and its optimum aperture, stacking can either work better or worse than bellows or extensions. You need to experiment. Adding extra glass is usually not the best idea, but if the tube lens is high quality there can be very little degradation. The objective generally determines the image quality, and the tube lens just magnifies the central portion of the image from the lens.

This thread has been broad-scoped since the beginning, so no worries on asking questions about how to use the El-Cheapos you buy!
Contact me for photographic equipment or visit my home page at:
http://macrocoins.com
Pillar of the Community
United States
2857 Posts
 Posted 10/12/2016  10:27 am  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
Amazing deal on 90mm f4.5 lenses. Even if you don't use if for photography, it makes a nice 4x loupe.

http://www.ebay.com/itm/26266707470...AMEBIDX%3AIT
Contact me for photographic equipment or visit my home page at:
http://macrocoins.com
Pillar of the Community
United States
2857 Posts
Pillar of the Community
Canada
1226 Posts
 Posted 07/02/2017  10:25 am  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
wow there was some great deals there. thanks for listing these ray.
Valued Member
Ireland
61 Posts
 Posted 07/04/2017  5:36 pm  Show Profile   Bookmark this reply Add 2taol to your friends list Get a Link to this Reply
Hi all, just wondering if anyone tried a printers loupe
and a mobile phone or lens before?



I have plans to use an OHP lens on a stand to create a
registry distance and use my mobile phone.
This could be a simple perspex tube cut to the desired length.





Valued Member
Canada
163 Posts
 Posted 07/05/2017  01:51 am  Show Profile   Bookmark this reply Add Nikon to your friends list Get a Link to this Reply
Actually I have... its great for up close shots... but not awesome for getting the whole coin in.
Valued Member
Ireland
61 Posts
 Posted 07/05/2017  6:31 pm  Show Profile   Bookmark this reply Add 2taol to your friends list Get a Link to this Reply
actually you are right, its perfect for small coins
and great for detail or "macro" shots.
Pillar of the Community
Austria
1907 Posts
 Posted 07/17/2017  3:26 pm  Show Profile   Bookmark this reply Add austrokiwi to your friends list Get a Link to this Reply
If the dirt in the lens can be cleaned it is a a potentially very good deal. The lens is designed for 16mm film but reversed it will cover a full frame sensor( 36mm X 24mm). Its an Achromatic Gauss design with 6 elements in 5 groups. It doesn't have a filter thread but RAF camera makes an adapter( you will also need a 52mm Reversing ring. It produces good images up to about 8X magnification.

http://www.ebay.co.uk/itm/Minolta-3...AOSwFBRZbNIa

Edit: Its sold now.
Don't buy the book before the coin as too often the book is wrong. "Buy" the story then the coin
Edited by austrokiwi
07/18/2017 12:41 am
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