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MMouse
Joined: 18 Apr 2018 Posts: 58
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Posted: Fri Nov 09, 2018 7:14 am Post subject: Tamron adaptall 90mm aperture blades |
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MMouse wrote:
Hello,
Just bought a very clean sample of this lens (early metal version).
However, I'm surprised that aperture blades look slightly misaligned with spiky hole at f/4 and f/5,6.
Not a big deal but since it's a macro, bokeh matters a bit, and bokeh in the highlights may too.
I don't remember my previous one had this issue. Can somebody confirm or not ?
If the blades are supposed to be better aligned, is it easy to fix ?
Thank you |
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kypfer
Joined: 27 Sep 2017 Posts: 513 Location: Jersey C.I.
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Posted: Fri Nov 09, 2018 7:56 am Post subject: |
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kypfer wrote:
My Tamron 90mm model 52B does exhibit slightly "spiky" corners to the aperture at f/4 and f/5.6. I've owned the lens for over 30 years and I don't remember ever noticing a "bokeh" issue, but when I'm up close and personal with a beetle or butterfly that's probably the last thing on my mind
Get out there and try it ... I'm sure you'll be very happy |
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MMouse
Joined: 18 Apr 2018 Posts: 58
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Posted: Fri Nov 09, 2018 9:04 am Post subject: |
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MMouse wrote:
Thank you.
A few mounths ago, I did a foliage serie with the sun into the frame with various lenses, so there was highlights bokeh.
Since that, I realized it does matter in certain conditions, and I remember I was happy that the Tamron had 9 aperture blades, more than the 90mm f/2,8 1:1 macro (Vivitar, Panagor...) I had too.
But you're right, it's a great lens and mine has mint glass, got it for a very reasonable price. I also shot 80% of the time wide open so not a big deal. |
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visualopsins
Joined: 05 Mar 2009 Posts: 10463 Location: California
Expire: 2021-06-22
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Posted: Fri Nov 09, 2018 9:30 am Post subject: |
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visualopsins wrote:
A feature, that (spikey) star-shaped aperture makes for pretty bokeh...for example the 50/4 Macro-Takumars have it too. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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: Fri Nov 09, 2018 10:32 am Post subject: |
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cooltouch wrote:
Like kypfer, I've owned my 52B for almost 30 years and I've never noticed any unusual bokeh with mine. I don't have mine handy to check right now, but I'd recommend you do as kypfer recommended and just go shoot with it and see what you think. I'll say this, though -- when I'm after most pleasing bokeh, I always shoot with a lens wide open. Macros being macros, though, it is still possible to have pleasing bokeh even with a lens stopped down some. So I'd just give it a try under all lighting conditions.
Whether the 52B or 52BB, the Tamron macro is a remarkable lens -- one of the best macros out there regardless of price -- and can often be found for a very reasonable sum, especially when compared to what other macros sell for. _________________ 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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visualopsins
Joined: 05 Mar 2009 Posts: 10463 Location: California
Expire: 2021-06-22
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Posted: Fri Nov 09, 2018 3:41 pm Post subject: |
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visualopsins wrote:
What lenses with star-shaped aperture do You know
_________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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