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thomasbest
Joined: 16 Mar 2015 Posts: 25
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Posted: Sat Jul 20, 2019 5:36 pm Post subject: reversing a lens for macro |
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thomasbest wrote:
i,ve seen the vodeo's of reversing a lens for macro by cutting the body cap and attaching a filter to it but is it necessary to remove the glass from the filter? would leaving the glass on effect the results? _________________ Canon 500D>>Helios 44M 58/2, Carl Zeiss Jena DDR Tessar 50/2.8, Carl Zeiss Jena MC P 29/2.8,Carl Zeiss Jena DDR MC S 135/3.5, Soligor wide auto 35/3.5, Palar auto P 135/2.8, Pentacon 50/1.8, Harmony 400/8. Panagor 135mm/2.8, Panagor 200mm/3.5, Cosinon 50mm/1.8., Vivitar 70-210mm f4, Konica hexanon 50mm 1.8. (AR), Helios 44K-4 58mm (PK). |
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visualopsins
Joined: 05 Mar 2009 Posts: 10462 Location: California
Expire: 2021-06-22
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Posted: Sat Jul 20, 2019 5:58 pm Post subject: |
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visualopsins wrote:
In my experience glass added to lens rear (front of reversed lens) has more effect on IQ.
Reverse adapters are inexpensive. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200
Tele-Takumar 1:5.6/200, 1:6.3/300
Macro-Takumar 1:4/50
Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm
Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element),
Super-Multi-Coated Fisheye-TAKUMAR 1:4/17
Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500
Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100
Super-Multi-Coated Bellows-TAKUMAR 1:4/100
SMC TAKUMAR 1:1.4/50, 1:1.8/55
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Sat Jul 20, 2019 8:26 pm Post subject: |
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cooltouch wrote:
I would remove it. Whenever it's possible to remove an intervening piece of glass from an optic, to me it's a good thing. I've had occasions to observe filters remarkably degrade images. Yes, on these instances, the filters were off-brand, but as a general rule, I avoid them whenever possible.
But why bother with this? Unless yours is a particularly obscure application, you should be able to find a reversing ring for your lens and camera combination. You might have to use a step-up or step-down ring to get the lens to mount to the reversing ring, but this sort of arrangement is much preferable to just about any other way of reversing an optic.
I have a 35mm lens that I've used reversed and, on a few occasions, didn't even bother with any sort of mount for the lens. I just held it in front of the camera. Worked fine, as long as the shutter speed was high enough.
Try doing a search on eBay for a reversing ring. Say, for example, your camera is a Nikon and you have a lens with a 52mm front filter thread. Just search for a 52mm reversing ring for Nikon. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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philslizzy
Joined: 07 Aug 2012 Posts: 4747 Location: Cheshire, England
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Posted: Wed Jul 24, 2019 2:41 pm Post subject: |
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philslizzy wrote:
I don't suppose you ever would but for any one else here a word of warning:
Please buy the correct reversing ring. Recently on another forum a user bought a NEX-52mm reversing ring and wondered why his Nikon lens wouldn't focus.[edit: it wasn't a 50mm] If you are getting a reversing ring buy it for the lens fitting. eg (like this guy) you are using a Nikkor lens on a NEX camera via an adaptor then get a 52mm/nikon adaptor.
[Edit: or just ignore this advice see post below. All lenses behave differently when reversed I have discovered since writing this. The only advice I will give is that extension tubes or a focusing helical will help.] _________________ Hero in the 'messin-with-cameras-for-the-hell-of-it department'. Official.
Last edited by philslizzy on Wed Jul 24, 2019 7:52 pm; edited 1 time in total |
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visualopsins
Joined: 05 Mar 2009 Posts: 10462 Location: California
Expire: 2021-06-22
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Posted: Wed Jul 24, 2019 5:15 pm Post subject: |
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visualopsins wrote:
philslizzy wrote: |
I don't suppose you ever would but for any one else here a word of warning:
Please buy the correct reversing ring. Recently on another forum a user bought a NEX-52mm reversing ring and wondered why his Nikon lens wouldn't focus. If you are getting a reversing ring buy it for the lens fitting. eg (like this guy) you are using a Nikkor lens on a NEX camera via an adaptor then get a 52mm/nikon adaptor |
What? Both adapters should work fine albeit at different magnifications due to extension difference imho. Maybe I'm wrong? _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200
Tele-Takumar 1:5.6/200, 1:6.3/300
Macro-Takumar 1:4/50
Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm
Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element),
Super-Multi-Coated Fisheye-TAKUMAR 1:4/17
Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500
Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100
Super-Multi-Coated Bellows-TAKUMAR 1:4/100
SMC TAKUMAR 1:1.4/50, 1:1.8/55
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Thu Jul 25, 2019 4:55 am Post subject: |
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cooltouch wrote:
Just take the lens you want to reverse, and hold it up to the camera. Aim at a subject and move the lens in and out. This will help you decide how much extension you'll need, if any. My experience, when holding a reversed lens up to an SLR was I had to set it practically against the lens mount. For a NEX, this may be different. I'm not so sure you'll be able to depend on just having greater (or less) magnification. I'm upstairs as I type this and my camera gear is all downstairs, else I'd give it a try. It should be easy enough to determine, though, from a few minutes of experimentation. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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Blazer0ne
Joined: 12 Sep 2018 Posts: 836
Expire: 2024-12-07
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Posted: Thu Jul 25, 2019 12:54 pm Post subject: Re: reversing a lens for macro |
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Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 7:12 pm; edited 1 time in total |
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DConvert
Joined: 12 Jun 2010 Posts: 901 Location: Essex UK
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Posted: Sun Aug 04, 2019 8:14 pm Post subject: |
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DConvert wrote:
philslizzy wrote: |
I don't suppose you ever would but for any one else here a word of warning:
Please buy the correct reversing ring. Recently on another forum a user bought a NEX-52mm reversing ring and wondered why his Nikon lens wouldn't focus.[edit: it wasn't a 50mm] If you are getting a reversing ring buy it for the lens fitting. eg (like this guy) you are using a Nikkor lens on a NEX camera via an adaptor then get a 52mm/nikon adaptor.
[Edit: or just ignore this advice see post below. All lenses behave differently when reversed I have discovered since writing this. The only advice I will give is that extension tubes or a focusing helical will help.] |
The magnification from a reversed lens can be difficult to predict, but AFAIK there are none of moderately normal focal lengths (at least 20-135mm) that won't focus if reversed directly on any camera body. adding extension will always give more magnification to the lens.
With block focusing lenses the focus control, on the lens will have NO effect on the focus instead the focus control will just move the mount further from the camera & leave the optic unchanged. Internal focusing lenses differ here...
There are some reversing set ups that have a portion that mounts on the lens mount joined to the body mount via a wire to enable aperture control on EF lenses for example. If your using old lenses with an aperture ring there's no real need for this. |
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Amirax
Joined: 02 Oct 2019 Posts: 2 Location: Chicago
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Posted: Wed Oct 02, 2019 2:49 pm Post subject: |
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Amirax wrote:
I would definitely remove it. Whenever it's possible to remove a broken oe cracked piece of glass from an optic, to me it's a good thing. |
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Buddycas
Joined: 18 Oct 2019 Posts: 1
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Posted: Sat Oct 19, 2019 1:08 pm Post subject: |
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Buddycas wrote:
Could you not cause more damage than good if something goes wrong while removing it though? |
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philslizzy
Joined: 07 Aug 2012 Posts: 4747 Location: Cheshire, England
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Posted: Fri Oct 25, 2019 1:53 pm Post subject: |
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philslizzy wrote:
just get a reversing ring _________________ Hero in the 'messin-with-cameras-for-the-hell-of-it department'. Official. |
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