Auto Chinon lens mount trimming

BandiDanielDavid · 04-01-2015, 06:14 AM

Jut bought an Auto Chinon 35-80 mm, f:3.5-4.9, in excellent condition, I'm planning to use it on my pentax K-5, but the lens mount needs some trimming, in order to fit properly. Any ideas, how to do it, so the optics, mechanics wont be damaged? I mean, if I use some kind of saw, maybe some metal particles might get into the lens body, obstructing the optics, mechanics, etc. so, if I'd have a better option, I'd avoid the previously mentioned one.

VisualDarkness · 04-01-2015, 06:21 AM

Take the mount off.

Jean Poitiers · 04-01-2015, 09:00 AM

Can you post an image of the lens and mount ? I do not understand what you need to "trim" ... the aperture protection ... J

sterretje · 04-01-2015, 09:12 AM

Assuming it's the lens as shown on https://www.flickr.com/photos/kurotonohage/sets/72157631349939700/ , you can probably take the mount of and remove the flange that protects the aperture lever after that.

Just a set of precision screw drivers (probably JIS, but small Phillips might do if the screws are not too tight).

BandiDanielDavid · 04-02-2015, 12:19 AM

Thanks, will do!

04-01-2015, 06:14 AM	#1
BandiDanielDavid New Member Join Date: Sep 2013 Posts: 6	Auto Chinon lens mount trimming Jut bought an Auto Chinon 35-80 mm, f:3.5-4.9, in excellent condition, I'm planning to use it on my pentax K-5, but the lens mount needs some trimming, in order to fit properly. Any ideas, how to do it, so the optics, mechanics wont be damaged? I mean, if I use some kind of saw, maybe some metal particles might get into the lens body, obstructing the optics, mechanics, etc. so, if I'd have a better option, I'd avoid the previously mentioned one.

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04-01-2015, 06:21 AM	#2
VisualDarkness Veteran Member Join Date: Nov 2011 Location: Uppsala, Sweden Photos: Gallery Posts: 4,439	Take the mount off.

04-01-2015, 09:00 AM	#3
Jean Poitiers Pentaxian Join Date: Apr 2011 Location: Lost in translation ... Photos: Gallery \| Albums Posts: 18,076	Can you post an image of the lens and mount ? I do not understand what you need to "trim" ... the aperture protection ... J

04-01-2015, 09:12 AM	#4
sterretje Veteran Member Join Date: Dec 2008 Location: Roodepoort, South Africa Photos: Gallery \| Albums Posts: 3,561	Assuming it's the lens as shown on https://www.flickr.com/photos/kurotonohage/sets/72157631349939700/ , you can probably take the mount of and remove the flange that protects the aperture lever after that. Just a set of precision screw drivers (probably JIS, but small Phillips might do if the screws are not too tight).

04-02-2015, 12:19 AM	#5
BandiDanielDavid New Member Join Date: Sep 2013 Posts: 6 Original Poster	Thanks, will do!

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