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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 09 Feb 2015 (Monday) 16:16
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Does anyone use a Mirror Lens?

 
dodgyexposure
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Feb 23, 2015 22:26 as a reply to  @ post 17446393 |  #16

The only doughnuts are in the exhaust!


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ericcrazyman
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Feb 24, 2015 08:45 |  #17

I found an old f10 800mm B&L mirror lens in a junk shop. not bad results with it. Pain in the butt focus, little dial needs many many turns from close to far focus.


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Mar 02, 2015 11:57 |  #18

I converted a Canon 500mm reflex to EF mount with an AF confirm chip. The AF confirm isn't perfect, but it helps a lot. It's a fun lens to play with. No CA, surprisingly sharp given the generally bad reputation mirror lenses have. The biggest issue I have is the fixed f/8 aperture. You need a lot of light to be able to shoot hand-held at that focal length. Still, I've used it successfully for wildlife, sports and a little bit of astrophotography. If nothing else, it teaches you to be aware of your background at all times.


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Mar 08, 2015 17:25 |  #19

Here's an image I grabbed the other day with the Samyang 500mm /f6.3 mirror. First is SOOC and second is the best I could do with my limited skills in Lr.



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Charlie
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Mar 09, 2015 00:30 |  #20

can any of these lenses be stopped down for improved sharpness? The idea of a sharp 500 is nice, I wouldnt be hand holding it.

I have a samyang 650-1300 normal lens, and IQ is quite low. Would love something small and compact, but if IQ sucks, then forget it.


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DreDaze
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Mar 09, 2015 00:31 |  #21

you can't change the aperture on any of them


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ZoneV
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Mar 09, 2015 00:55 |  #22

DreDaze wrote in post #17466763 (external link)
you can't change the aperture on any of them

There is a old mirror lens with iris, the Ohnar 300mm f/5.6 - it can be stopped down to f/16 - at 500mm focal lenght I don´t know any that sllows stopping down:
http://mirrorlens.blog​spot.de …nar-300mm-f56-mirror.html (external link)
http://blog.xuite.net …9%96%8B%E7%AE%B​1%E6%96%87 (external link)


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Apr 27, 2015 23:06 |  #23

There are indeed a few rare mirror lenses with adjustable aperture (I vaguely recall that Pentax made one long ago) but the technical hurdles are such that it's not worth the added cost and complexity. Mirror lenses are essentially catadioptric telescopes, and you don't see too many of those running around. Here's a shot I got with my Canon FD 500 a few years back. These aren't the greatest for action, but if you pre-focus where you expect the action to happen...

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ZoneV
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Apr 28, 2015 01:28 |  #24

jblaschke wrote in post #17535268 (external link)
There are indeed a few rare mirror lenses with adjustable aperture (I vaguely recall that Pentax made one long ago) but the technical hurdles are such that it's not worth the added cost and complexity...

I don´t found a Pentax mirror lens with iris.
Here those photographic mirror lenses with iris I know:

There are those Ohnar 300mm/5.6 lenses, probably even some with other name on it, another is the Quantaray 500mm f8, probably there are different versions, one has an iris.
The other I know are the rare Meta Makowsky Katoptaron TS 8/500 E / Goema Katoptar TS 8/500 E / Telespect 500mm 1:11 angled mirror lenses, they have a iris, and in contrast to most photographic mirror lenses no central obstruction.


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Apr 19, 2016 12:10 |  #25

i'm using the 800mm F.8, it's fun :) and for the mirror scheme it's feather light, less than one half of the cheapest 150-500 sigma zoom.

but it's quite useless for real life-shooting. you need Liveview and some magnifying extra screen coz the depth of field is really narrow.

Lack of IS/OS at 800mm is HUGE issue, maybe using the new pentax/sony mirrorless with in-camera stabilization could be a deal.

finally F8 is too dark, the 500mm F6.3 could be better choice

someone got nice stuff with the star tracker?


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vengence
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Apr 19, 2016 20:07 |  #26

They can be fun to play with, do keep in mind while it may be f/8 it's T-stop is closer to T/11 or something, so you will need tons of light.




  
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Apr 19, 2016 22:40 |  #27

METAL1 wrote in post #17977319 (external link)
someone got nice stuff with the star tracker?

i've been thinking of mounting my tamron 500mm on my ioptron...but i feel like i'd have to research how to shoot deep sky stuff before i bother that...all the different exposures, and the stacking, i've never delved into it all


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May 25, 2016 05:56 |  #28

Fuji XPRO1, Samyang 800 F8, 1/1000, 1250ISO


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omer
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May 25, 2016 16:22 |  #29

I did once a mini review of the samyang 500
See here https://photography-on-the.net …/showthread.php​?t=1020919

Bottom line you get what you pay for


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May 30, 2016 19:16 as a reply to  @ omer's post |  #30

i should'nt have posted the 100% crop ;-)a


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Does anyone use a Mirror Lens?
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