Takuma 42 mount Len ?

stevewong · 12-20-2014, 06:22 PM

Hello to All,
I had received two Takuma lens 50 f1.4 and 35 f2 today.Both Lens have a Manual and Auto Switch on them.
This is my first time use Manual len 42 Mount. I had a Pentax Adapter K to 42 .I did took few shots with both Lens in M mode on K-10D boby.
I could NOT Understand Auto Switch on the Len, How do you use it ?. What is set in the K-10D Boby when it in Auto Position ?
Please help me out !!!!
Thank you,
steve

**mattt** · 12-20-2014, 06:35 PM

Later version M42 mount bodies could stop down during the shutter actuation. The Auto Mode would work for them.

The switch could also be read, Open and Closed. Open for focusing (in Auto) and Closed (Manual) for determining exposure and ultimately making the shot.

If you put the lens in Auto Mode, set an aperture to like f8, then press the pin on the back of the lens you will find the aperture closes.

Adam · 12-20-2014, 06:43 PM

Originally posted by stevewong

Hello to All,
I had received two Takuma lens 50 f1.4 and 35 f2 today.Both Lens have a Manual and Auto Switch on them.
This is my first time use Manual len 42 Mount. I had a Pentax Adapter K to 42 .I did took few shots with both Lens in M mode on K-10D boby.
I could NOT Understand Auto Switch on the Len, How do you use it ?. What is set in the K-10D Boby when it in Auto Position ?
Please help me out !!!!
Thank you,
steve

On a K10D, the switch must be in manual. The auto position was only designed for open-aperture shooting on later Spotmatic bodies, as mattt describes.

M42 shooting instructions for digital:
https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html

stevewong · 12-20-2014, 07:17 PM

Originally posted by mattt

Later version M42 mount bodies could stop down during the shutter actuation. The Auto Mode would work for them.

The switch could also be read, Open and Closed. Open for focusing (in Auto) and Closed (Manual) for determining exposure and ultimately making the shot.

If you put the lens in Auto Mode, set an aperture to like f8, then press the pin on the back of the lens you will find the aperture closes.

Thanks Mattt for your help !!.I will try it out !!
Thank you,
steve

---------- Post added 12-20-14 at 08:19 PM ----------

Originally posted by Adam

On a K10D, the switch must be in manual. The auto position was only designed for open-aperture shooting on later Spotmatic bodies, as mattt describes.

M42 shooting instructions for digital:
https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html

Thanks for the Link ! I will do some reading about 42 - len !!

Steve

tim60 · 12-20-2014, 10:02 PM

Nice lenses you received. I think the others have got you straight on how to use them.

stevewong · 12-21-2014, 09:35 AM

Originally posted by tim60

Nice lenses you received. I think the others have got you straight on how to use them.

Thanks Tim,
I am learning how to use Manual len ! Takuma lens over 35 years ,they still work well on pentax K-10 D.

steve

12-20-2014, 06:22 PM	#1
stevewong Senior Member Join Date: Jul 2013 Posts: 215	Takuma 42 mount Len ? Hello to All, I had received two Takuma lens 50 f1.4 and 35 f2 today.Both Lens have a Manual and Auto Switch on them. This is my first time use Manual len 42 Mount. I had a Pentax Adapter K to 42 .I did took few shots with both Lens in M mode on K-10D boby. I could NOT Understand Auto Switch on the Len, How do you use it ?. What is set in the K-10D Boby when it in Auto Position ? Please help me out !!!! Thank you, steve

12-20-2014, 06:43 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by stevewong Hello to All, I had received two Takuma lens 50 f1.4 and 35 f2 today.Both Lens have a Manual and Auto Switch on them. This is my first time use Manual len 42 Mount. I had a Pentax Adapter K to 42 .I did took few shots with both Lens in M mode on K-10D boby. I could NOT Understand Auto Switch on the Len, How do you use it ?. What is set in the K-10D Boby when it in Auto Position ? Please help me out !!!! Thank you, steve On a K10D, the switch must be in manual. The auto position was only designed for open-aperture shooting on later Spotmatic bodies, as mattt describes. M42 shooting instructions for digital: https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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12-20-2014, 06:35 PM	#2
mattt Site Supporter Join Date: Feb 2011 Location: Niagara Photos: Gallery \| Albums Posts: 3,907	Later version M42 mount bodies could stop down during the shutter actuation. The Auto Mode would work for them. The switch could also be read, Open and Closed. Open for focusing (in Auto) and Closed (Manual) for determining exposure and ultimately making the shot. If you put the lens in Auto Mode, set an aperture to like f8, then press the pin on the back of the lens you will find the aperture closes.

12-20-2014, 07:17 PM	#4
stevewong Senior Member Join Date: Jul 2013 Posts: 215 Original Poster	Originally posted by mattt Later version M42 mount bodies could stop down during the shutter actuation. The Auto Mode would work for them. The switch could also be read, Open and Closed. Open for focusing (in Auto) and Closed (Manual) for determining exposure and ultimately making the shot. If you put the lens in Auto Mode, set an aperture to like f8, then press the pin on the back of the lens you will find the aperture closes. Thanks Mattt for your help !!.I will try it out !! Thank you, steve ---------- Post added 12-20-14 at 08:19 PM ---------- Originally posted by Adam On a K10D, the switch must be in manual. The auto position was only designed for open-aperture shooting on later Spotmatic bodies, as mattt describes. M42 shooting instructions for digital: https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html Thanks for the Link ! I will do some reading about 42 - len !! Steve

12-20-2014, 10:02 PM	#5
tim60 Pentaxian Join Date: Apr 2011 Photos: Albums Posts: 8,756	Nice lenses you received. I think the others have got you straight on how to use them.

12-21-2014, 09:35 AM	#6
stevewong Senior Member Join Date: Jul 2013 Posts: 215 Original Poster	Originally posted by tim60 Nice lenses you received. I think the others have got you straight on how to use them. Thanks Tim, I am learning how to use Manual len ! Takuma lens over 35 years ,they still work well on pentax K-10 D. steve