Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-21-2010, 01:18 PM   #1
Inactive Account




Join Date: Feb 2010
Posts: 2
K7 with hereditary lenses (non-Pentax)

I've inherited my father's Pentax Z-10 and associated lenses. Iím looking into purchasing a K7, however two of the lenses Iíve received are not Pentax.

One of the lenses is a macro (sorry, the only information I have on this is ď2x APK Macro Teleplus MC7 with a code 5802205. I also has in green 1:1 - 1:3 0.45m/50mm, and in white 1:1.5 - 1:20 infinity / 50mm).

The other is a Takumar Bayonet zoom (1:4.5 80-200mm)

They both have a K mounting Ė ie they fit the K7DLSR but the K7 does not digitally read the aperture on these lenses. I was under the impression that you can manually override the aperture. Is this correct and would these type of lens suit this camera?

Sorry if some of this information is not presented in an accurate manner, I don't have any of the original manuals with the lenses and am fairly new to photography.

02-21-2010, 01:29 PM   #2
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,485
QuoteOriginally posted by salsd Quote
I've inherited my father's Pentax Z-10 and associated lenses. Iím looking into purchasing a K7, however two of the lenses Iíve received are not Pentax.

One of the lenses is a macro (sorry, the only information I have on this is ď2x APK Macro Teleplus MC7 with a code 5802205. I also has in green 1:1 - 1:3 0.45m/50mm, and in white 1:1.5 - 1:20 infinity / 50mm).

The other is a Takumar Bayonet zoom (1:4.5 80-200mm)

They both have a K mounting Ė ie they fit the K7DLSR but the K7 does not digitally read the aperture on these lenses. I was under the impression that you can manually override the aperture. Is this correct and would these type of lens suit this camera?

Sorry if some of this information is not presented in an accurate manner, I don't have any of the original manuals with the lenses and am fairly new to photography.
If your Takumar is a Takumar-A then it can be used in full auto modes on any pentax DSLR. Minus Auto Focus of course. If not, only manual mode in which you have to physically turn the aperture ring (make sure you set custom menu function to allow aperture ring).

Your other is not a lens but a teleconverter. What the information is telling you is that if you have a 50mm lens mounted on it, the ratio numbers are your macro magnification. Not all TCs do this. The APK? or is it PK/A? either way, if it has the contacts to pass info to the camera, it will allow auto modes such as Av to be used (with an A type or later lens). If you mount an A 50mm f2.0 lens on the converter and set it to 1:1 you will have a 100mm f4 Macro lens capable of 1:1 reproduction.

Here's an example from a similar TC and a pentax m 50 f2.0




Click image for full sized view

02-21-2010, 02:27 PM   #3
Veteran Member
GerryL's Avatar

Join Date: Jan 2009
Location: CA
Posts: 2,731
Welcome to the forums Salsd.
As already explained above, the other lens you have is a 2X TC (teleconverter).
It multiplies whatever lens you mount together with it by a factor of 2X.
As for using manual lenses on your K-7, here is the link: https://www.pentaxforums.com/forums/pentax-beginners-corner-q/59272-shooting-...x-dslrs-f.html
02-21-2010, 11:15 PM   #4
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,264
QuoteOriginally posted by salsd Quote
I've inherited my father's Pentax Z-10 and associated lenses. Iím looking into purchasing a K7, however two of the lenses Iíve received are not Pentax.
...
The other is a Takumar Bayonet zoom (1:4.5 80-200mm)
Takumar is the old brand name for Pentax-made lenses. Yes, you have a fine vintage Pentax lens! Well, maybe not so fine -- the single review here [ Pentax Lens Review and Specification Database - 80-200mm F4.5 Bayonet ] only rates it 2/10. Maybe yours is better. We can hope...

02-22-2010, 11:41 AM   #5
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
Since this thread is not just about the camera per se, but also about lenses - and is a basic beginner question at that - I'm moving it to the beginner's forum.
02-22-2010, 02:14 PM   #6
Inactive Account




Join Date: Feb 2010
Posts: 2
Original Poster
Thanks Marc, sorry for posting in the wrong spot - but appreciate everyones assitance.
02-22-2010, 02:56 PM   #7
Veteran Member
inferno10's Avatar

Join Date: Feb 2007
Location: San Francisco, California
Posts: 342
You can use old manual lenses on your K-7. You will need to change a custom setting to enable it to work. See here: https://www.pentaxforums.com/forums/pentax-beginners-corner-q/59272-shooting-...x-dslrs-f.html

With those lenses, you cannot set aperture in-camera. Furthermore, you are either relegated to shooting wide open in P/Av/Tv mode. If you shoot in "M" mode, you can set the aperture via the aperture ring, then stop down to meter by pressing the green button (I think). It's a bit tedious, but it will work.

- Jason
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
aperture, camera, information, k7, lenses, macro, pentax, pentax help, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: (3) Vivitar Series 1 70-210mm lenses + 3 Pentax lenses JP_Seattle Sold Items 13 04-23-2010 03:10 PM
Pentax Km and old manual lenses: SMC Takumars & Tamron Adaptall 2 lenses Kendrick Troubleshooting and Beginner Help 10 04-14-2010 03:23 AM
For Sale - Sold: FS: Pentax SF7-body / AF400FTZ / 3 Pentax-F lenses / GENUINE Pentax-accessori frederik9111 Sold Items 7 03-23-2008 03:00 PM



All times are GMT -7. The time now is 07:16 PM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top