Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-28-2014, 05:44 AM   #1
New Member




Join Date: Oct 2014
Posts: 12
Pentax 6*7 ttl meter

Hello,

I have just added a Pentax 67 TTL Prism Finder 6x7 to my 67. I am not able to get it to operate, needle just stays at the top of the metering frame. Battery in camera is good.
Any thoughts or suggestions? This should activate right away correct? I removed the lens and meter prism but nothing.

Thanks, flathead

10-28-2014, 07:10 AM   #2
Senior Member




Join Date: Feb 2013
Photos: Gallery
Posts: 140
There's a little switch on the side that you have to push to get the meter to activate, it only stays on for a few seconds at a time.
10-28-2014, 07:38 AM   #3
New Member




Join Date: Oct 2014
Posts: 12
Original Poster
We are talking about the little on/off switch on the top of the meter head? I have turned that on and off a bunch of times but nothing...
10-28-2014, 08:46 AM   #4
Pentaxian
LFLee's Avatar

Join Date: Aug 2009
Location: Western MA
Photos: Gallery | Albums
Posts: 2,264
QuoteOriginally posted by flathead Quote
We are talking about the little on/off switch on the top of the meter head? I have turned that on and off a bunch of times but nothing...
... did you remove the lens before you put the prism on?
there is a sequence you need to follow...

10-28-2014, 11:03 AM   #5
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 912
If your TTL is not activating, the needle should be on the bottom of the window, not the top. It could be that your ASA dial is set in the upper range and so all readings are pinned to the top of the window, indicating way overexposure. There have been some TTLs that were reversed, in that the needle was at the top of the window when not activated or when underexposed. This is rare though. Remember that the TTL has a working range and if you are outside of it, the meter will not activate. An example is setting the ASA to 800 and the shutter speed to 1/8 second or slower.
10-28-2014, 11:08 AM   #6
New Member




Join Date: Oct 2014
Posts: 12
Original Poster
I did remove the lens, followed directions from a instruction manual that I found online.
Should the f-ring be linked to a tab in front of the focus screen? Nothing happens when I move the f-ring back and forth. Regardless there should be some movement of the needle when the meter is switched on and off??

---------- Post added 10-28-14 at 02:22 PM ----------

This meter prism is I think an earlier one "Asahi Pentax" on the front. The prism that was originally on the camera just said "Pentax". Does that make a difference? Is the earlier a 6*7 and the later 67?
10-28-2014, 11:56 AM   #7
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 912
The bodies that had 6x7 on them had the Asahi Pentax or Honeywell Pentax finders. The bodies with 67 are newer and had the Pentax finder. The older Asahi and Honeywell finders are now becoming inaccurate with age.
10-28-2014, 12:06 PM   #8
Senior Member
klaus123's Avatar

Join Date: Apr 2011
Location: Germany
Posts: 210
Check with a Multimeter that teh body really gives its Voltage Supply to the Prism. Last time I had problems was when I purchsed a 6x7 and put my 67 TTL-Prism on to it... and found the transmitter chain broken.

10-28-2014, 01:27 PM   #9
New Member




Join Date: Oct 2014
Posts: 12
Original Poster
I put a voltmeter on the 2 end terminals of the body? There are 3 near the back of the body,not sure that the middle terminal connects to anything.
10-28-2014, 05:23 PM   #10
New Member




Join Date: Oct 2014
Posts: 12
Original Poster
I am getting 6 volts between the left and center terminals(looking from the back of the camera), nothing between the right and left terminals. The prism seems to make contact with the 2 outside terminals.
10-28-2014, 05:49 PM   #11
Senior Member
johnha's Avatar

Join Date: Apr 2012
Location: Lancashire, UK
Posts: 250
Have you tried metering with the lens in stop-down metering (lens Auto/Man switch in 'Man')?

I have two bodies and two prisms (bought as pairs):
- P67 with 'Asahi' metering prism - this meters from the bottom up in both Auto & Man.
- P6x7 MLU with 'Asahi' metering prism - this meters from the top down BUT only in Man.

The two body/prism combinations seem to meter similar values, but swapping the prisms & bodies results in neither of them metering at all.

Last edited by johnha; 10-28-2014 at 05:59 PM. Reason: Minor tweak
10-28-2014, 06:35 PM   #12
New Member




Join Date: Oct 2014
Posts: 12
Original Poster
QuoteOriginally posted by johnha Quote
Have you tried metering with the lens in stop-down metering (lens Auto/Man switch in 'Man')?

I have two bodies and two prisms (bought as pairs):
- P67 with 'Asahi' metering prism - this meters from the bottom up in both Auto & Man.
- P6x7 MLU with 'Asahi' metering prism - this meters from the top down BUT only in Man.

The two body/prism combinations seem to meter similar values, but swapping the prisms & bodies results in neither of them metering at all.
Switching to Man. did show some activity on the meter. With asa 100 and f22 @ 250 in room light. The meter needle started at the top with meter off and jumped off the screen when I turned on the meter.
Sounds like the prism/meter may have issues.

---------- Post added 10-28-14 at 09:39 PM ----------

Would I be likely to have better luck with a 67 meter?
10-28-2014, 06:47 PM   #13
Veteran Member
Silent Street's Avatar

Join Date: Nov 2011
Location: Geelong & Richmond, Vic AUS
Posts: 547
Invest in a new Pentax 67 TTL meter. It is too speculative for anybody to diagnose what the problem or fault is without actually seeing the camera.
10-28-2014, 07:15 PM   #14
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 5,343
QuoteOriginally posted by flathead Quote
Would I be likely to have better luck with a 67 meter?
These 6x7/67 TTL meters are hit and miss. When they work they are accurate, however they cause unnecessary grief.

Liberate yourself and ditch the ttl metered prism and get one of the non metered prism/finders & a handheld light meter.

You’ll never look back.

Phil.

PS the 67ii & AE metered prism are a totally redesigned beast and do work very well.
10-28-2014, 08:46 PM   #15
Veteran Member
Silent Street's Avatar

Join Date: Nov 2011
Location: Geelong & Richmond, Vic AUS
Posts: 547
QuoteOriginally posted by gofour3 Quote
These 6x7/67 TTL meters are hit and miss. When they work they are accurate, however they cause unnecessary grief.

Liberate yourself and ditch the ttl metered prism and get one of the non metered prism/finders & a handheld light meter.

You’ll never look back.

Phil.

PS the 67ii & AE metered prism are a totally redesigned beast and do work very well.
It's good advice, but for a lot of people, beginners especially, relying on the TTL meter may be their only course early on. I have the 67 TTL meter in-situ; only very occasionally do I rely on it. 99.9% of the time I use multispot/incident/duplex metering for very precise results on transparency. I don't play games.
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!
645d, 645z, auto, bodies, camera, conditions, film, front, lens, light, medium format, meter, meters, pentax, pentax 6*7 ttl, phil, pictures, post, prism, range, shadows, slide, slide film, ttl
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax 6x7 TTL meter question -Daan- Pentax Medium Format 13 08-08-2013 10:56 AM
TTL Meter Repair? blablub Pentax Medium Format 13 04-19-2013 06:46 AM
Pentax 67 TTL pentaprism meter problem? bienemaya Pentax Medium Format 9 04-24-2012 06:06 AM
Pentax 67 TTL prism meter window not visible vmixer Pentax Medium Format 8 11-15-2011 07:54 AM



All times are GMT -7. The time now is 12:37 PM. | See also: NikonForums.com, CanonForums.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