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 Replies: 528 / Views: 87,178 |
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Pillar of the Community
2087 Posts |
This is an older style lens. It was superseded by the 80 mm F4. I have an example and it is a solid performer( but not as good as the modern SK equivalent). If some one can get it for around US$100.00 it would be a good deal. I don't know the seller( paypal would be a the only way to pay with such a new seller) http://www.ebay.co.uk/itm/222003051...RK:MEBIDX:ITEdited by austrokiwi
01/23/2016 10:30 am
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Pillar of the Community
  United States
4037 Posts |
I'm curious about the SK comment. I have few experiences with SK lenses. I've purchased quite a few, but had to send almost all back due to some issue they had. Many were hazy in the same way, so I assumed that model or that manufacturing time period had some issue, but I have seen several models with similar issues. Because of this I have generally avoided SK lenses, but I've heard so many good things about them I am thinking of jumping in again. Can you outline your experiences with the different ones you've owned? I am very interested to do a shootout to test the equivalent Rodenstock and SK lenses.
Contact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Pillar of the Community
2087 Posts |
See the lens comparison thread I will be posting in the next hour. Its been a horrible snowy day so I had been comparing some lenses. MY Sk experience is with very new lenses( last 10 years)... My best is an APO 45mm F4 (obtained second hand but had beenused in a Machine vision system ) the other is a dedicated machine vision lens which is just a repackaged enlarger lens(50mm F2.8).
Edited by austrokiwi
01/23/2016 12:57 pm
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Pillar of the Community
United States
4037 Posts |
I have Componon-S 80/5.6 and 100/4, both purchased recently. I also have a 80/4 on the way to me for an 80mm shootout I plan to do. I'm very interested in seeing the 80/4 vs the Rodagon 80/4. I wish I had owned the 100/4 when I did the 100mm shootout. Maybe I'll do a special comparison test. Looking forward to your lens comparison thread! edited to add: I've seen a 75mm f4 Apo Artar from SK that I'd love to test, but the only one available has a pretty dire description with scratches, haze, and fungus and they still want lots of money for it. I suppose this discussion is outside the realm of El-Cheapo lenses. One thing I'd like to say is that I've seen really nice results from the 75/3.5 EL-Omegar (not Rodenstock...not sure who actually made them) and want folks to know that these seem like a sure bet as a starter lens for very low $$. There are 10 of them on ebay right now for <$20. Contact me for photographic equipment or visit my home page at: http://macrocoins.comEdited by rmpsrpms
01/23/2016 1:14 pm
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Pillar of the Community
United States
4037 Posts |
Here is a Nikon 80mm f5.6 EL-Nikkor for an EL-Cheapo price. The description says there is a bit of haze inside, which may be fine, or may need cleaning, or may even be too far gone to clean, depending on how picky the person listing is. May be worth asking for more details. http://www.ebay.com/itm/Nikon-EL-Ni...51646670469? |
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Pillar of the Community
United States
4037 Posts |
Here is an EL-Cheapo deal, a Tominon 75mm for $29.95 with free shipping! I'd buy it myself but I have a few that will end up integrated into custom setups. Only issue is these have an odd threading, M40, so require an adapter. This adapter works with the Tominon 105mm, 135mm, 50mm, 35mm, and 17mm macro lenses so if you buy an adapter you can use it for other lenses as well. I highly recommend the 35mm for higher mag work as it has an adjustable aperture so can produce decent images without stacking. Here's the 75mm: http://www.ebay.com/itm/28193238355...RK:MEBIDX:ITI recommend the adapter from jinfinance: http://www.ebay.com/itm/Mitutoyo-BD...5x8SH5rQS9ZgContact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Pillar of the Community
United States
4037 Posts |
I don't usually link to non-lens auctions in this thread, but I thought this was something folks might be interested. In the <$400 and <$350 threads, among others, the recommended camera is a Canon Rebel XS. These usually sell in the $150 range (cheaper now than when those threads were started). The cameras sometimes have various faults, such as non-working flash, battery compartment errors, etc that make them unusable for normal walkaround photography. But when used as a dedicated coin camera, these faults are irrelevant. Knowing this, coin photographers can often pick up a usable camera for cheap. The auction linked below has an error I have not heard of before. Apparently the camera won't recognize a memory card. When tethering, it's not necessary to have a memory card installed, as the newly-shot images are downloaded directly to DPP for editing. So a long as the camera is used in the studio environment, memory card fault won't be an issue. And for $60, how are you going to beat it? http://www.ebay.com/itm/Canon-EOS-R...AOSwe7BWwjDg |
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Pillar of the Community
United States
4037 Posts |
Contact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Valued Member
United States
441 Posts |
I'm looking to improve upon my <$400 thread setup. Is there any benefit in upgrading an El-Omegar 1:3,5 75mm to a Rodenstock Rodagon 1:5,6 80mm lens for coin photos et al? Would there be any substantial improvement in picture quality and focusing with an 80mm vs. a 75mm?
Also, can someone educate me in "see Spot run" language as to the elements in a lens, i.e. does more elements mean a better lens when it comes to photographing coins?
From what I've read, the APO Rodagon-D f1:4.5 is one of the best enlarger lenses for DIY non-pro coin photographing. I might have to save my duckies up to get one of these.
Opinions/recommendations please and thanks.
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Pillar of the Community
United States
4037 Posts |
You will see only a very small improvement, if any, going from 75EO to 80RR. You'd see a little more improvement with the 75ARD1. The one you quoted (f4.5) is the 75ARD2, which I don't recommend unless you mostly photograph Dollars. It is optimized around 0.5:1 magnification rather than around 1:1, so is a little better for Dollars. You can tell them apart by their max aperture: f4 for the 1:1, and f4.5 for the 0.5:1.
It takes quite a lot of optical design effort to correct all lens aberrations. Each type of aberration (distortion, chromatic aberration, etc) requires specific types of glass and curvatures and coatings. It's tough to correct everything with just a few lens elements, so well-corrected lenses have many elements.
Contact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Valued Member
United States
441 Posts |
Ray,
I don't understand the 0.5:1 vs. 1:1 magnification relevant to coin size, distance, etc. Please explain in simple terms. Thx.
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Pillar of the Community
United States
4037 Posts |
Magnification is simply the size of the image on the sensor / size of the object. The sensor on your Canon is about 15mm tall. A Dollar is about 38mm in diameter. If you "fill the sensor" with the Dollar, the magnification is 15/38=0.4. The 75ARD2 lens is optimized around 0.5 magnification, very close to that required for the Dollar.
Dimes are 18mm in diameter, so magnification is 15/18=0.8. The 75ARD1 lens is optimized around 1.0 magnification, very close to that required for the Dime.
Each lens has an optimum range of magnification. Most enlarger lenses are best from .05 to 0.5 magnification (1/20 to 1/2). If you reverse them, they are good from 2:1 up to perhaps 5:1. So this leaves a "hole" in the range of 0.5...2:1 where enlarger lenses are not optimized. Duplication lenses (like the 75ARD1 and 75ARD2) are designed to fill in this hole. The 75ARD2 is good from around 0.25...1.0 "forward" and 1.0...4.0 in reverse. The 75ARD1 is optimized for a narrower range of 0.5...2.0, forward or reversed. This narrower range allows it to have a little better performance in its range than the 75ARD2 in the same range.
Contact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Pillar of the Community
United States
1314 Posts |
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Pillar of the Community
United States
1314 Posts |
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Pillar of the Community
2087 Posts |
Agfa repromaster 80mm F 4.5. It looks like it has locking rings for fitting to a large format view camera, Those locking rings appear to be bolted together as opposed to being epoxied together. I thought long and hard before posting here( I sill might buy it if it isn't sold in a couple of weeks). Still not sure what the mount size is( I suspect it may be M34mm). If you look at getting it; check with the seller as to whether the rings can be removed(If they can it will seem a silly question to the seller but better that than finding you have a nasty problem) http://www.ebay.co.uk/itm/Agfa-80mm...AOSwu1VW6DbFEdited by austrokiwi
05/13/2016 01:08 am
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Replies: 528 / Views: 87,178 |
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Posted 01/23/2016 12:39 pm
