Using green button with Takumar lens - (?)

Michael Piziak · 02-18-2022, 04:22 PM - **1 Like**

Is it possible to use the "green button" method with most Tukumar lens?
Just curious....

**FozzFoster** · 02-18-2022, 04:31 PM - **3 Likes**

yep you can use tAkumar lenses with green button functionality - especially in M mode. Stop down your aperture, hit the green button, and you've got your appropriate shutter speed.
However, it is easier to place the camera in Av mode, and get a real-time reading of your required shutter speed as you stop down the lens.

---------- Post added 02-18-22 at 04:40 PM ----------

its one of my most favourite features..

kypfer · 02-18-2022, 05:13 PM

Is this a screw-mount or a K-mount Takumar?
For screw-mount FozzFoster's recommendations are good, but for a K-mount lens you'll need to stick with Manual Mode and use the green button if you're not working wide open.

Michael Piziak · 02-18-2022, 05:46 PM

Originally posted by kypfer

Is this a screw-mount or a K-mount Takumar?
For screw-mount FozzFoster's recommendations are good, but for a K-mount lens you'll need to stick with Manual Mode and use the green button if you're not working wide open.

I thought all the Tukumar were screw mount, as that's what I see when shopping. I did just google it and you are correct that some were k mount - what I read though said the k mount versions were of inferior quality & shouldn't be a target for collectors.....

Further question: I suppose, using a Tukumar lens (with green button), is very similar to using an M k mount lens, eh? Many Tukumar lens simply cost less, because they aren't k mount, and would make for affordable additions to ones collection (?)

kypfer · 02-18-2022, 06:19 PM - **1 Like**

Originally posted by Michael Piziak

I thought all the Tukumar were screw mount, as that's what I see when shopping. I did just google it and you are correct that some were k mount - what I read though said the k mount versions were of inferior quality & shouldn't be a target for collectors.....
Further question: I suppose, using a Tukumar lens (with green button), is very similar to using an M k mount lens, eh? Many Tukumar lens simply cost less, because they aren't k mount, and would make for affordable additions to ones collection (?)

Alleged "inferior" build quality doesn't necessarily mean inferior optical quality … just means if you drop it it's less likely to bounce

I don't consider myself a "collector", more of an "accumulator" … I pick up interesting stuff at "sensible" prices … sometimes I get lucky

I use the green button in Manual Mode exclusively when I'm not using "A" capable lenses, screw mount or K mount … just my way of ensuring I don't make a mistake!
My "manual mantra" is F-A-S-T :-
Focus, with the lens wide open
Aperture, close down as required
Shutter, press the green button to get a reading
Take the picture

I've been using this since the '60's … it still works

Now I've got my K-3iii I've got the option of using the older non-A K-mount lenses in Av etc., but old habits die hard!

**UncleVanya** · 02-18-2022, 07:11 PM

Originally posted by kypfer

Alleged "inferior" build quality doesn't necessarily mean inferior optical quality … just means if you drop it it's less likely to bounce

I don't consider myself a "collector", more of an "accumulator" … I pick up interesting stuff at "sensible" prices … sometimes I get lucky

I use the green button in Manual Mode exclusively when I'm not using "A" capable lenses, screw mount or K mount … just my way of ensuring I don't make a mistake!
My "manual mantra" is F-A-S-T :-
Focus, with the lens wide open
Aperture, close down as required
Shutter, press the green button to get a reading
Take the picture

I've been using this since the '60's … it still works

Now I've got my K-3iii I've got the option of using the older non-A K-mount lenses in Av etc., but old habits die hard!

FAST Works as long as the lens doesn’t exhibit aperture related focus shift. Some lenses do but mostly not dslr ones.

que es tu · 02-19-2022, 01:59 PM

Originally posted by Michael Piziak

I thought all the Tukumar were screw mount, as that's what I see when shopping. I did just google it and you are correct that some were k mount - what I read though said the k mount versions were of inferior quality & shouldn't be a target for collectors.....

Further question: I suppose, using a Tukumar lens (with green button), is very similar to using an M k mount lens, eh? Many Tukumar lens simply cost less, because they aren't k mount, and would make for affordable additions to ones collection (?)

You can get Takumars with SMC coating and K mount. Check out the user reviews here on the Forums. Just beware of UNCOATED cheap Takumars. The lens will have SMC engraved on it. If not, run screaming into the night!!!

kypfer · 02-19-2022, 03:10 PM - **1 Like**

Originally posted by que es tu

Just beware of UNCOATED cheap Takumars. The lens will have SMC engraved on it. If not, run screaming into the night!!!

A little over-exaggeration I feel

My 28mm f/2.8 Takumar-A is a perfectly good lens … not SMC-engraved maybe, but certainly not uncoated.
As with virtually all my lenses, it's invariably used with a lens-hood, for mechanical protection as much as anything else, so I may not be pushing it to it's "optical extremes" as far as out-of-frame side-lighting is concerned, but if I do my job the lens gives very acceptable results, certainly on a par with my 28mm f/2.8 SMC Pentax-M

que es tu · 02-19-2022, 03:56 PM

Originally posted by kypfer

A little over-exaggeration I feel

My 28mm f/2.8 Takumar-A is a perfectly good lens … not SMC-engraved maybe, but certainly not uncoated.
As with virtually all my lenses, it's invariably used with a lens-hood, for mechanical protection as much as anything else, so I may not be pushing it to it's "optical extremes" as far as out-of-frame side-lighting is concerned, but if I do my job the lens gives very acceptable results, certainly on a par with my 28mm f/2.8 SMC Pentax-M

I didn’t mean to overreact!!

. I am under the understanding that there are “Takumars” of inferior quality from the 1980s or so that have no optical coating. I may be wrong, but that is what I remember from the “comprehensive lens guide” here on the Forums. I hope I didn’t cause any confusion.

**UncleVanya** · 02-19-2022, 04:41 PM

Originally posted by que es tu

I didn’t mean to overreact!!

. I am under the understanding that there are “Takumars” of inferior quality from the 1980s or so that have no optical coating. I may be wrong, but that is what I remember from the “comprehensive lens guide” here on the Forums. I hope I didn’t cause any confusion.

Even the Takumar Bayonet 135/2.5 I have is coated - but they didn’t use SMC coatings. My guess is that they were single coated or multi coated but not as many layers.

que es tu · 02-20-2022, 07:13 AM

Originally posted by UncleVanya

Even the Takumar Bayonet 135/2.5 I have is coated - but they didn’t use SMC coatings. My guess is that they were single coated or multi coated but not as many layers.

Yes, you are correct. I checked the Lens Guide, and those lenses lack the SMC multi-coating. My fault for relying on memory and not checking first!

02-18-2022, 04:22 PM - 1 Like	#1
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815	Using green button with Takumar lens - (?) Is it possible to use the "green button" method with most Tukumar lens? Just curious....

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Using green button with remote switch	RedRuff	Pentax Camera and Field Accessories	17	05-06-2020 02:47 PM
Disable green button for back-button focus?	Igor123	Pentax K-1 & K-1 II	7	06-03-2019 08:01 PM
Using a fixed aperture manual lens and green button	ripper2860	Troubleshooting and Beginner Help	12	06-06-2014 09:25 PM
Green button and AE-L button	voyager13	Troubleshooting and Beginner Help	7	06-28-2012 12:26 PM
Green button or +/- button for meter?	kidblue	Pentax SLR Lens Discussion	15	07-29-2011 07:10 PM

02-18-2022, 04:31 PM - 3 Likes	#2
FozzFoster Custom User Title Join Date: Jan 2016 Location: Alberta Photos: Albums Posts: 6,806	yep you can use tAkumar lenses with green button functionality - especially in M mode. Stop down your aperture, hit the green button, and you've got your appropriate shutter speed. However, it is easier to place the camera in Av mode, and get a real-time reading of your required shutter speed as you stop down the lens. ---------- Post added 02-18-22 at 04:40 PM ---------- its one of my most favourite features..

02-18-2022, 05:13 PM	#3
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,594	Is this a screw-mount or a K-mount Takumar? For screw-mount FozzFoster's recommendations are good, but for a K-mount lens you'll need to stick with Manual Mode and use the green button if you're not working wide open.

02-18-2022, 05:46 PM	#4
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815 Original Poster	Originally posted by kypfer Is this a screw-mount or a K-mount Takumar? For screw-mount FozzFoster's recommendations are good, but for a K-mount lens you'll need to stick with Manual Mode and use the green button if you're not working wide open. I thought all the Tukumar were screw mount, as that's what I see when shopping. I did just google it and you are correct that some were k mount - what I read though said the k mount versions were of inferior quality & shouldn't be a target for collectors..... Further question: I suppose, using a Tukumar lens (with green button), is very similar to using an M k mount lens, eh? Many Tukumar lens simply cost less, because they aren't k mount, and would make for affordable additions to ones collection (?)

02-18-2022, 06:19 PM - 1 Like	#5
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,594	Originally posted by Michael Piziak I thought all the Tukumar were screw mount, as that's what I see when shopping. I did just google it and you are correct that some were k mount - what I read though said the k mount versions were of inferior quality & shouldn't be a target for collectors..... Further question: I suppose, using a Tukumar lens (with green button), is very similar to using an M k mount lens, eh? Many Tukumar lens simply cost less, because they aren't k mount, and would make for affordable additions to ones collection (?) Alleged "inferior" build quality doesn't necessarily mean inferior optical quality … just means if you drop it it's less likely to bounce I don't consider myself a "collector", more of an "accumulator" … I pick up interesting stuff at "sensible" prices … sometimes I get lucky I use the green button in Manual Mode exclusively when I'm not using "A" capable lenses, screw mount or K mount … just my way of ensuring I don't make a mistake! My "manual mantra" is F-A-S-T :- Focus, with the lens wide open Aperture, close down as required Shutter, press the green button to get a reading Take the picture I've been using this since the '60's … it still works Now I've got my K-3iii I've got the option of using the older non-A K-mount lenses in Av etc., but old habits die hard!

02-18-2022, 07:11 PM	#6
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,404	Originally posted by kypfer Alleged "inferior" build quality doesn't necessarily mean inferior optical quality … just means if you drop it it's less likely to bounce I don't consider myself a "collector", more of an "accumulator" … I pick up interesting stuff at "sensible" prices … sometimes I get lucky I use the green button in Manual Mode exclusively when I'm not using "A" capable lenses, screw mount or K mount … just my way of ensuring I don't make a mistake! My "manual mantra" is F-A-S-T :- Focus, with the lens wide open Aperture, close down as required Shutter, press the green button to get a reading Take the picture I've been using this since the '60's … it still works Now I've got my K-3iii I've got the option of using the older non-A K-mount lenses in Av etc., but old habits die hard! FAST Works as long as the lens doesn’t exhibit aperture related focus shift. Some lenses do but mostly not dslr ones.

02-19-2022, 01:59 PM	#7
que es tu Pentaxian Join Date: Feb 2020 Location: Smoky Mountains, NC Photos: Gallery \| Albums Posts: 1,602	Originally posted by Michael Piziak I thought all the Tukumar were screw mount, as that's what I see when shopping. I did just google it and you are correct that some were k mount - what I read though said the k mount versions were of inferior quality & shouldn't be a target for collectors..... Further question: I suppose, using a Tukumar lens (with green button), is very similar to using an M k mount lens, eh? Many Tukumar lens simply cost less, because they aren't k mount, and would make for affordable additions to ones collection (?) You can get Takumars with SMC coating and K mount. Check out the user reviews here on the Forums. Just beware of UNCOATED cheap Takumars. The lens will have SMC engraved on it. If not, run screaming into the night!!!

02-19-2022, 03:10 PM - 1 Like	#8
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,594	Originally posted by que es tu Just beware of UNCOATED cheap Takumars. The lens will have SMC engraved on it. If not, run screaming into the night!!! A little over-exaggeration I feel My 28mm f/2.8 Takumar-A is a perfectly good lens … not SMC-engraved maybe, but certainly not uncoated. As with virtually all my lenses, it's invariably used with a lens-hood, for mechanical protection as much as anything else, so I may not be pushing it to it's "optical extremes" as far as out-of-frame side-lighting is concerned, but if I do my job the lens gives very acceptable results, certainly on a par with my 28mm f/2.8 SMC Pentax-M

02-19-2022, 03:56 PM	#9
que es tu Pentaxian Join Date: Feb 2020 Location: Smoky Mountains, NC Photos: Gallery \| Albums Posts: 1,602	Originally posted by kypfer A little over-exaggeration I feel My 28mm f/2.8 Takumar-A is a perfectly good lens … not SMC-engraved maybe, but certainly not uncoated. As with virtually all my lenses, it's invariably used with a lens-hood, for mechanical protection as much as anything else, so I may not be pushing it to it's "optical extremes" as far as out-of-frame side-lighting is concerned, but if I do my job the lens gives very acceptable results, certainly on a par with my 28mm f/2.8 SMC Pentax-M I didn’t mean to overreact!! . I am under the understanding that there are “Takumars” of inferior quality from the 1980s or so that have no optical coating. I may be wrong, but that is what I remember from the “comprehensive lens guide” here on the Forums. I hope I didn’t cause any confusion.

02-19-2022, 04:41 PM	#10
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,404	Originally posted by que es tu I didn’t mean to overreact!! . I am under the understanding that there are “Takumars” of inferior quality from the 1980s or so that have no optical coating. I may be wrong, but that is what I remember from the “comprehensive lens guide” here on the Forums. I hope I didn’t cause any confusion. Even the Takumar Bayonet 135/2.5 I have is coated - but they didn’t use SMC coatings. My guess is that they were single coated or multi coated but not as many layers.

02-20-2022, 07:13 AM	#11
que es tu Pentaxian Join Date: Feb 2020 Location: Smoky Mountains, NC Photos: Gallery \| Albums Posts: 1,602	Originally posted by UncleVanya Even the Takumar Bayonet 135/2.5 I have is coated - but they didn’t use SMC coatings. My guess is that they were single coated or multi coated but not as many layers. Yes, you are correct. I checked the Lens Guide, and those lenses lack the SMC multi-coating. My fault for relying on memory and not checking first!