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07/02/2012 08:03:54 AM · #26 |
Originally posted by mike_311:
i have a budget minded friend looking to get into macro, does anyone know of an older canon mount with a manual aperture ring that would be affordable to them? |
If you're gonna use it strictly for reversing, it doesn't have to be Canon mount...
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07/02/2012 10:51:25 AM · #27 |
Originally posted by Bear_Music:
Originally posted by mike_311:
i have a budget minded friend looking to get into macro, does anyone know of an older canon mount with a manual aperture ring that would be affordable to them? |
If you're gonna use it strictly for reversing, it doesn't have to be Canon mount... |
lol. good point.
so can one use any prime lens to reverse mount?
Message edited by author 2012-07-02 10:53:14. |
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07/02/2012 11:18:01 AM · #28 |
Originally posted by mike_311:
so can one use any prime lens to reverse mount? |
Yes, you can. A relatively fast 50mm is always a good choice. Shorter focal lengths will give higher magnification, FWIW. For real fun, get something that can also be mounted normally via a mechanical adapter. That still gives a lot of options, Canon EOS being the most accommodating SLR system with respect to use of lenses from other systems.
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07/02/2012 12:15:23 PM · #29 |
Originally posted by mike_311:
i have a budget minded friend looking to get into macro, does anyone know of an older canon mount with a manual aperture ring that would be affordable to them? |
The older manual focus FD series Canon lenses can be used for this.
If you want to be able to use the aperture, it's necessary to find and release the latch that holds the knurled lock ring, at the back of the lens, and rotate the ring as you would to mount it on the camera. Then you have to move and hold the longer lever that sticks out of the back of the lens. The aperture ring will then control the aperture. The FD Canon mount series lenses can be found on eBay. They are generally not all that expensive if you keep looking, because they don't fit any of the current cameras without having to use an adapter. Another place to look is flea markets or thrift shops if there's no rush about making the buy.
On lenses like the FD mount where you need to hold a lever to make the aperture ring work the aperture, you can put a small rubber band on the lever, then pull it back over the outside of the lens, and put another rubber band around the whole lens to hold the first one.
An even better option is to cut a small piece of a broad rubber band or something similar, move the lever, and wedge the lever in place with the piece of rubber in the slot, being careful to not lose it into the lens. I also used this "wedge" trick on a G series Nikkor (they have no aperture ring) to keep the aperture open when using an older teleconverter or extension rings.
With many older manual lenses, for instance the Minolta MD mount, and Yashika mount, the aperture ring works the aperture with the lens reversed with no tinkering.
You can use any brand lens that has filter threads, on any brand camera, with a reversing ring to fit the camera. If necessary one reversing ring and a couple of male thread to female thread step up or down rings will allow you to use several lenses with different size filter threads. The limiting factor would be if the lens physically is too big to fit under the prism box that sticks out at the top of the camera.
Message edited by author 2012-07-02 12:38:17.
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01/30/2013 12:20:10 PM · #30 |
I am using Nikon D5100 and lenses I am having is Nikkor 18-55mm VR lens (filter 52mm), Tamron 90mm F/2.8 (filter 55mm) and Tamron 18-270mm lens (filter 62mm). Is there any converter available to reverse my lenses. Please advise, or If you can suggest any cheaper lens which can be used with my available lenses.
Happy Varghese |
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01/30/2013 02:47:51 PM · #31 |
Off the cuff, my suggestion would be to find a cheap 50mm lens (doesn't even need to be Nikon) that has a thread size close to the Tamron 90mm, and buy a ring with double-male threads of the proper sizes to mate them.
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01/30/2013 03:27:13 PM · #32 |
Isn't the Tamron 90 already a macro lens? You're probably going to have an easier time using the Tamron in normal orientation than you will trying to reverse a lens.
But if you really want to try this technique, a cheap 50mm f/1.8 is probably your best bet. They can be had on ebay for <$100. |
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01/30/2013 04:01:28 PM · #33 |
Originally posted by Ann:
Isn't the Tamron 90 already a macro lens? You're probably going to have an easier time using the Tamron in normal orientation than you will trying to reverse a lens.
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Yes it is. The maximum magnification is 1:1, meaning that the image projected onto the sensor will be life size. Mounting a reversed 50mm will increase the magnification beyond that. I prefer extension tubes, but they're a bit more expensive. |
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01/30/2013 04:08:49 PM · #34 |
Originally posted by Spork99:
Originally posted by Ann:
Isn't the Tamron 90 already a macro lens? You're probably going to have an easier time using the Tamron in normal orientation than you will trying to reverse a lens.
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Yes it is. The maximum magnification is 1:1, meaning that the image projected onto the sensor will be life size. Mounting a reversed 50mm will increase the magnification beyond that. I prefer extension tubes, but they're a bit more expensive. |
A question, then. I've never reversed a lens onto another lens. I assume you'd need to use a fairly long lens as your "forward" lens, right? Otherwise the focus plane is going to be somewhere inside the camera. |
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01/30/2013 04:36:13 PM · #35 |
Originally posted by Ann:
Originally posted by Spork99:
Originally posted by Ann:
Isn't the Tamron 90 already a macro lens? You're probably going to have an easier time using the Tamron in normal orientation than you will trying to reverse a lens.
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Yes it is. The maximum magnification is 1:1, meaning that the image projected onto the sensor will be life size. Mounting a reversed 50mm will increase the magnification beyond that. I prefer extension tubes, but they're a bit more expensive. |
A question, then. I've never reversed a lens onto another lens. I assume you'd need to use a fairly long lens as your "forward" lens, right? Otherwise the focus plane is going to be somewhere inside the camera. |
No. The "rear" lens handles the focusing and usually the aperture control. The front lens which normally takes an image of something big and projects it onto the sensor at a much smaller size does exactly the opposite when turned around. see HERE for illustrations |
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01/30/2013 04:42:18 PM · #36 |
What the Sporkster said... I'll just add that:
- With a 100mm-class macro lens (capable of 1:1) and a reverse-mounted 50mm, the theoretical maximum magnification will be 3x. The real-world maximum magnification will be a bit less, because the macro lenses typically have smaller effective focal lengths at maximum magnification. For instance, I can achieve 2.88x with my Canon 100 macro and a reversed 50mm.
- You really want a fast lens for the reversed lens to limit vignetting. It's less a concern for APS-C than for a 35mm sensor.
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01/30/2013 05:25:16 PM · #37 |
Originally posted by Spork99:
The "rear" lens handles the focusing and usually the aperture control. The front lens which normally takes an image of something big and projects it onto the sensor at a much smaller size does exactly the opposite when turned around. see HERE for illustrations |
Thanks for the link ΓΆ€” the pictures were really helpful. |
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01/30/2013 05:27:07 PM · #38 |
| I may have to try this. I own everything except the reversing rings... |
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01/30/2013 11:04:35 PM · #39 |
Originally posted by kirbic:
What the Sporkster said... I'll just add that:
- With a 100mm-class macro lens (capable of 1:1) and a reverse-mounted 50mm, the theoretical maximum magnification will be 3x. The real-world maximum magnification will be a bit less, because the macro lenses typically have smaller effective focal lengths at maximum magnification. For instance, I can achieve 2.88x with my Canon 100 macro and a reversed 50mm.
- You really want a fast lens for the reversed lens to limit vignetting. It's less a concern for APS-C than for a 35mm sensor. |
Yeah, it's pretty straight forward, really. You could test it out without rings by setting up your camera at the edge of a counter top and building up a platform of whatever in front of it to hold your second lens, then move an object forward and backward in front of the lenses. This will at least give you an idea of what you're dealing with. 3:1 is SUPER small though....  |
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01/31/2013 02:36:04 AM · #40 |
| thank you all. nicely presented and linked. |
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