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Forum: Lens Clubs
10-25-2019, 08:02 PM
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went out with mine today
here are a couple of a Sumatran Tiger Cub at the Topeka Zoo and Conservation Center
K 3 II + Tamron Adaptall-2 SP 500mm f/8 Mirror (55BB) 82 F
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Forum: Lens Clubs
08-18-2019, 06:39 AM
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it could always be my monitor but I see no bokeh in the second photo
it is a great photo
same as the third
now I am talking about the spaghetti-0 bokeh common with mirror lenses
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Forum: Lens Clubs
08-18-2019, 05:13 AM
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Forum: Lens Clubs
08-17-2019, 05:09 PM
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no I mean that I have taken photos without any bokeh being produced
check the photos in the thread many have no bokeh at all
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Forum: Lens Clubs
08-14-2019, 09:54 AM
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i didn't think you were
and i agree Spaghetti-O bokeh is better
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Forum: Lens Clubs
08-14-2019, 08:11 AM
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Hey, I never called them doughnuts, that is in the quote ;)
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Forum: Lens Clubs
08-14-2019, 04:24 AM
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what happens with mirror ( AKA catadioptric ) lenses:
" No Aperture: The Mirror Lens
The catadioptric or mirror lens—basically a reflector telescope—produces distinctive out-of-focus shapes popularly known as “doughnut bokeh.” Mirror lenses generally do not have adjustable diaphragm apertures. The distinctive shape of the bokeh comes from the design of the lens and the placement of the reflecting mirror in the center of the image. Light enters the optical tube, passes a small mirror, and strikes a concave mirror at the rear of the tube. The light is focused back toward the small mirror and reflected back through a hole in the concave mirror where the camera or eyepiece is mounted.
The result is bokeh with a bright edge and a relatively dark center. Some folks love this effect. Others despise it. Remember, bokeh quality is subjective . . . "
- Understanding Bokeh | B&H Explora
obviously not every photo taken with a " mirror " lens produces bokeh.
[ not my diagram ]
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Forum: Lens Clubs
08-13-2019, 06:58 PM
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fooling around with the K 3 and the Tamron Adaptall-2 SP 500mm f/8 Mirror (55BB)
hand held through the glass of the enclosure
SOOC
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Forum: Lens Clubs
05-22-2019, 02:23 PM
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Forum: Lens Clubs
03-12-2019, 06:06 AM
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unusual use of a telephoto
saw the light and grabbed the K 3 + Tamron Adaptall-2 SP 500mm f/8 Mirror (55BB)
crop only
more crop and pp
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Forum: Lens Clubs
03-10-2019, 02:34 PM
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K 3 + Tamron Adaptall-2 SP 500mm f/8 Mirror (55BB)
Female Sumatran Tiger at the Topeka Zoo and Conservation Center
[ hand held through the glass window of the enclosure ]
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Forum: Lens Clubs
03-09-2019, 04:12 AM
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Forum: Lens Clubs
03-08-2019, 06:09 PM
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got out today to try out the K 3 and my recently acquired Tamron SP 500 f8 TELE MACRO 55BB [ my first mirror lens ]
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Forum: Lens Clubs
03-07-2019, 06:39 AM
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