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MellyVinelli
Joined: 23 Jan 2018
Posts: 5
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 Posted: Wed Jan 24, 2018 12:03 am Post subject: 17 Blades CZJ Biotar 58mm f2 Focal Length? |
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MellyVinelli wrote:
Good day:
I'm new to this forum and this is my first post! I'm impressed with the wealth of knowledge from all the users here.
As this is a 17 blade version, I thought that the focal length was supposed to be indicated in 'cm' rather than 'mm'. As seen in the picture, it says '58mm'. The serial number also seems to indicate rather late production (~1954?) for this version. Is this some sort of anomaly? Any help would be appreciated thank you everyone!
MellyVinelli
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calvin83
Joined: 12 Apr 2009
Posts: 7584
Location: Hong Kong
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| Posted: Wed Jan 24, 2018 2:31 am Post subject: Re: 17 Blades CZJ Biotar 58mm f2 Focal Length? |
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calvin83 wrote:
| MellyVinelli wrote: |
Good day:
I'm new to this forum and this is my first post! I'm impressed with the wealth of knowledge from all the users here.
As this is a 17 blade version, I thought that the focal length was supposed to be indicated in 'cm' rather than 'mm'. As seen in the picture, it says '58mm'. The serial number also seems to indicate rather late production (~1954?) for this version. Is this some sort of anomaly? Any help would be appreciated thank you everyone!
MellyVinelli
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It is normal. Here is another example if you Google it
http://mkoptics.net/a/product_info.php?cPath=46_48&products_id=6180&osCsid=d3dc3e655545702ba76d4dc3b90a0a07
https://www.pinterest.co.uk/pin/337770040782593198/
_________________
The best lens is the one you have with you.
https://lensfever.com/
https://www.instagram.com/_lens_fever/ |
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MellyVinelli
Joined: 23 Jan 2018
Posts: 5
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| Posted: Wed Jan 24, 2018 2:46 am Post subject: |
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MellyVinelli wrote:
Thanks for your help! |
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visualopsins
Joined: 05 Mar 2009
Posts: 11059
Location: California
Expire: 2025-04-11
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| Posted: Wed Jan 24, 2018 5:12 am Post subject: |
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visualopsins wrote:
Welcome MellyVinelli
Nice lens!
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., 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
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A 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 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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MellyVinelli
Joined: 23 Jan 2018
Posts: 5
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| Posted: Sat Jan 27, 2018 4:21 pm Post subject: |
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MellyVinelli wrote:
Thank you.
I brought this example to my local camera repair shop and he noted "glue degradation/separation". I asked him what gave him the impression and he said it was the 3-4 bubbles in the forward group of lenses. I thought those are simply Zeiss bubbles and was a sign of quality in vintage lenses.
There doesn't seem to be any sort of the "rainbow film" on the edges and aside from minimal cleaning marks the lenses looks to be in good shape.
Could he be mistaken? |
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visualopsins
Joined: 05 Mar 2009
Posts: 11059
Location: California
Expire: 2025-04-11
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| Posted: Sat Jan 27, 2018 4:31 pm Post subject: |
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visualopsins wrote:
I guess we need to see those "bubbles", whatever he's seeing. I can't see anything like that in any photos of the lens in those links either. Bubbles are obviously air bubbles in the glass from what I've seen of those, tiny bubbles...
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., 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
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A 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 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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calvin83
Joined: 12 Apr 2009
Posts: 7584
Location: Hong Kong
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| Posted: Sat Jan 27, 2018 4:38 pm Post subject: |
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calvin83 wrote:
Separation rarely happens with post-war Biotars. If the 'bubbles' has black edges, they are small bubbles inside the glass.
_________________
The best lens is the one you have with you.
https://lensfever.com/
https://www.instagram.com/_lens_fever/ |
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MellyVinelli
Joined: 23 Jan 2018
Posts: 5
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| Posted: Sun Jan 28, 2018 2:20 pm Post subject: |
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MellyVinelli wrote:
Hello, here are some photos if it helps:
#1
#2
#3
I think I see black rings around the bubbles. Thoughts? |
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visualopsins
Joined: 05 Mar 2009
Posts: 11059
Location: California
Expire: 2025-04-11
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| Posted: Sun Jan 28, 2018 2:56 pm Post subject: |
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visualopsins wrote:
Look like air bubbles in glass to me, in #1.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., 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
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A 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 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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guardian
Joined: 18 Mar 2009
Posts: 1746
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| Posted: Sun Jan 28, 2018 3:49 pm Post subject: |
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guardian wrote:
Am not seeing anything distressing in those photos. |
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Lightshow
Joined: 04 Nov 2011
Posts: 3666
Location: Calgary
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| Posted: Mon Jan 29, 2018 9:19 pm Post subject: |
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Lightshow wrote:
Looks like glass bubbles to me, and they are only visible in pictures if you have bokeh balls.
Should be a fine lens. It may need some gentle cleaning as it looks dirty, hopefully it's only the outside surfaces.
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A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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MellyVinelli
Joined: 23 Jan 2018
Posts: 5
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| Posted: Wed Jan 31, 2018 8:52 pm Post subject: |
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MellyVinelli wrote:
Thanks for the feedback.
It is quite dirty but it's dirty on the inside surfaces. I see a bit of grease on the inside of the front element. I plan on bringing it to my trusted local repair shop and have him do an overhaul.
Is this a particularly difficult lens to work on? I've see YouTube videos on disassembly but I wouldn't do it myself. |
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