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walter g
Joined: 20 Feb 2010
Posts: 2463
Location: NC, USA
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 Posted: Fri Jan 03, 2020 7:11 am Post subject: Minolta 28mm f2.5 Versions |
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walter g wrote:
It's listed there are 3 versions.
MC1
MC2
Rokkor X
This thread is about the last version which
has the rubber grip.
The Rokkor X was only for the North American
Market.
Rest of the world
Minolta MC W Rokkor SI.
My Rokkor X Version
171XXXX. 347.5 grams
European Version
157XXXX. 345 grams
Why the discrepancy in weight?
_________________
Main cameras
Panasonic G5,Nikon J1,Pentax Q10,Sony Nex 6
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC Celtic 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PG 1.4/50, MC Rokkor X PG 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50, Auto 3.5/135
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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Ernst Dinkla
Joined: 30 Nov 2016
Posts: 410
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| Posted: Fri Jan 03, 2020 8:42 am Post subject: Re: Minolta 28mm f2.5 Versions |
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Ernst Dinkla wrote:
| walter g wrote: |
It's listed there are 3 versions.
MC1
MC2
Rokkor X
This thread is about the last version which
has the rubber grip.
The Rokkor X was only for the North American
Market.
Rest of the world
Minolta MC W Rokkor SI.
My Rokkor X Version
171XXXX. 347.5 grams
European Version
157XXXX. 345 grams
Why the discrepancy in weight? |
It is 2.5 gram, 9% of an ounce, this is not a journey to Mars.
There could be as much batch variations in US Rokkors
.
_________________
Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
March 2017 update, 750+ inkjet media white spectral plots |
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walter g
Joined: 20 Feb 2010
Posts: 2463
Location: NC, USA
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| Posted: Fri Jan 03, 2020 8:57 am Post subject: Re: Minolta 28mm f2.5 Versions |
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walter g wrote:
| Ernst Dinkla wrote: |
| walter g wrote: |
It's listed there are 3 versions.
MC1
MC2
Rokkor X
This thread is about the last version which
has the rubber grip.
The Rokkor X was only for the North American
Market.
Rest of the world
Minolta MC W Rokkor SI.
My Rokkor X Version
171XXXX. 347.5 grams
European Version
157XXXX. 345 grams
Why the discrepancy in weight? |
It is 2.5 gram, 9% of an ounce, this is not a journey to Mars.
There could be as much batch variations in US Rokkors
. |
Yes, it could also be a change in materials, a running design change, or change in optics.
I was curious if any one had heard of any design changes, or optic changes on the North American model.
_________________
Main cameras
Panasonic G5,Nikon J1,Pentax Q10,Sony Nex 6
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC Celtic 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PG 1.4/50, MC Rokkor X PG 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50, Auto 3.5/135
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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Lightshow
Joined: 04 Nov 2011
Posts: 3666
Location: Calgary
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| Posted: Tue Jan 07, 2020 12:11 am Post subject: |
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Lightshow wrote:
http://minolta.eazypix.de/lenses/index.html
To my knowledge the optics are unchanged other than coatings.
_________________
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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stevemark
Joined: 29 Apr 2011
Posts: 4073
Location: Switzerland
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| Posted: Thu Jan 09, 2020 12:47 pm Post subject: Re: Minolta 28mm f2.5 Versions |
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stevemark wrote:
| walter g wrote: |
It's listed there are 3 versions.
My Rokkor X Version
171XXXX. 347.5 grams
European Version
157XXXX. 345 grams
Why the discrepancy in weight? |
Manufacturing tolerances? Minor mechanical design changes?
I'll check the dozen or so MD 35-70 lenses i have at home for deviations from the nominal weight. Of course they were produced considerably later than the MC 2.5/28, and one would expect tighter tolerances.
S
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www.artaphot.ch |
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TeemÅ
Joined: 07 Apr 2016
Posts: 586
Location: Australia
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| Posted: Thu Jan 09, 2020 2:20 pm Post subject: |
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TeemÅ wrote:
Many Minolta lenses contain production variations based on serial number, not necessarily by location. The serial numbers are quite different. Generally, some mechanical pieces are simplified or the material or alloy changes slightly on some parts. You'd have to strip both down and inspect/weigh every part to know. |
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