Mirror Lens On A Mirrorless Camera
Apr 20, 2017 12:44:55 #
Reminds me of an old microwave oven we once had with a button that said Stop Time. Never push that button!!
Apr 20, 2017 13:17:29 #
wdross
Loc: Castle Rock, Colorado
Winslowe wrote:
What mirror lens functions could you lose?
For example, I use my film age Olympus 90mm f2 macro on my former Olympus E-M5 and now my E-M1mrII. The 90mm macro was a full frame lense and on a micro 4/3rds camera has a field of view the equivalent of a 180mm f2 in full frame terms. The adapter only provides the distance required to place the lense / camera in the proper relationship. The lense aperture has to be manually set, there is no autofocus (What is manual focusing?), and exposure is only proper shown if one shoots in aperture mode or manual mode. Olympus indicates it is only sharp to their standards between f4 and f11. Their standards are pertty tough since I commonly shoot with it at f2.8 and occasionally at f2 and I see very little degradation of quality.
Apr 20, 2017 13:28:07 #
BebuLamar wrote:
Not really as I don't know of an AF mirror lens. So it doesn't affect the AF. Lenses for SLR have longer flange distance so an adapter doesn't need any glass so the quality is the same.
You do now! http://en.wikipedia.org/wiki/Minolta_AF_Reflex_500mm_f/8
Apr 20, 2017 14:34:22 #
Mac wrote:
If you put a mirror lens on a mirrorless camera, will that spin you in to a time warp?
No but I have a dandy little 300 mm Rokinon Mirror lens for my Fujis, that acts just like a 450 and works very well indeed!
Apr 20, 2017 14:53:33 #
Mark Sturtevant wrote:
Reminds me of an old microwave oven we once had with a button that said Stop Time. Never push that button!!
I actually did Lol at that one.
Apr 20, 2017 14:55:29 #
Apr 20, 2017 15:00:27 #
cthahn wrote:
The posts on this site are getting more stupid by the day.
Always complaining. Do you EVER have anything positive to say?
Apr 20, 2017 15:02:58 #
wdross
Loc: Castle Rock, Colorado
tgreenhaw wrote:
Finally a question I feel qualified to answer!!!
No.
No.
But what was the question?
Apr 20, 2017 15:13:09 #
No it doesn't put you into a time warp, but it will put you into a doughnut hole. For those who don't know, the bokeh of mirror lenses often have doughnut like rings in the out of focus areas.
Apr 20, 2017 15:17:52 #
BHC wrote:
Always complaining. Do you (cthahn) EVER have anything positive to say?
Very seldom. I may have seen a total of two that were not actually negative, but didn't really qualify as positive.
I'm not sure whether he has his hemorrhoids wrapped around the axle or whether he was one of the early testers of preparations A - G!
Apr 20, 2017 15:19:42 #
dmsM43 wrote:
No it doesn't put you into a time warp, but it will put you into a doughnut hole. For those who don't know, the bokeh of mirror lenses often have doughnut like rings in the out of focus areas.
It's not the doughnut hole that is the problem, it's the doughnut!
Apr 20, 2017 15:27:42 #
Mac wrote:
If you put a mirror lens on a mirrorless camera, will that spin you in to a time warp?
It won't spin you into a time warp.
Technically, the camera would no longer be mirrorless
This bit of fun actually caught my eye because yesterday I was looking into what the heck a "Speed Booster" was. Basically if you take a lens designed for an SLR (mirrored) camera and mount it with a speed booster onto a mirrorless body with a smaller sensor, it makes the lens wider and faster. For example if you mount a 50 mm f1.2 Canon lens using a "Canon EF Lens to Micro Four Thirds T Speed Booster XL 0.64x" to the appropriate mirrorless body maybe an Olympus EM-1, it will act like a 32mm f0.77 lens.
Does anybody have any experience with these speed boosters? Is the quality any good? Is the depth of field so shallow, that nothing is ever really in focus?
Apr 20, 2017 15:57:03 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
Mac wrote:
If you put a mirror lens on a mirrorless camera, will that spin you in to a time warp?
The Minolta 500 f8 mirror lens will fit and operate on a Sony mirrorless camera.
Apr 20, 2017 16:03:40 #
tgreenhaw wrote:
It won't spin you into a time warp. br br Technic... (show quote)
Your comment about speed boosters has nothing to do with mirrors, just adapting and focusing the light captured by a full frame lens onto a smaller sensor. Clearly lens focusing distances factor in, but mirrors don't necessarily do so. I'm also not convinced about your focal length assertions. A 50mm lens remains a 50mm lens. However the field of view could be potentially the same as a 32mm lens designed for a M4/3 sensor. As for DOF, it will be thin at the widest aperture.
Without using intermediate adapters (with lenses) I have a modified 55mm f/1.2 Canon FL lens on my EOS APS-C body. I'm never short of light but the DOF wide open is razor thin. From a field of view perspective it is equivalent to a 88mm (portrait) lens on a full frame.
It's all about the frame of reference and the results. So far as I understand it, what the speed booster does is provide a couple of extra equivalent stops from concentrating the light at any aperture setting. How useful it is I have no idea.
Apr 20, 2017 16:06:48 #
wdross
Loc: Castle Rock, Colorado
tgreenhaw wrote:
It won't spin you into a time warp. br br Technic... (show quote)
I am fairly certain that UHH member Bill at burkphoto has some experience with these. As I recall, he indicated they work very well and actually improve potential image quality. You might want to PM him at burkphoto.
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