Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-14-2021, 02:55 PM   #1
Site Supporter
Site Supporter




Join Date: Jun 2020
Posts: 97
Looking for Pentax 6x7 lens diagrams in a brochure

I've seen a lot of brochures that show the elements for the 35mm lenses, I am looking for a brochure for the 6x7 lenses that shows the cut-through of the lens element layouts. I have an 800mm lens that has some internal cloudiness and without a diagram it's impossible to determine if the element is a compound element that has started failing or if it it has just gotten condensation at some point in its long life.

08-14-2021, 07:50 PM   #2
Loyal Site Supporter
Loyal Site Supporter




Join Date: Sep 2006
Location: midwest, United States
Photos: Gallery | Albums
Posts: 5,625
QuoteOriginally posted by dkpentax Quote
I've seen a lot of brochures that show the elements for the 35mm lenses, I am looking for a brochure for the 6x7 lenses that shows the cut-through of the lens element layouts. I have an 800mm lens that has some internal cloudiness and without a diagram it's impossible to determine if the element is a compound element that has started failing or if it it has just gotten condensation at some point in its long life.
The PentaxForums lens reviews has a diagram for the 800 F6.7, but not the F4.

Hope it helps,
barondla
08-15-2021, 11:37 AM   #3
Site Supporter
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 7,730
Here's most of them from a website:

6x7 Normal

6x7 Telephoto

6x7 Wide

Phil.
08-15-2021, 08:14 PM   #4
Site Supporter
Site Supporter




Join Date: Jun 2020
Posts: 97
Original Poster
those pages show every lens except mine.

08-15-2021, 10:43 PM   #5
Loyal Site Supporter
Loyal Site Supporter




Join Date: Sep 2006
Location: midwest, United States
Photos: Gallery | Albums
Posts: 5,625
QuoteOriginally posted by dkpentax Quote
those pages show every lens except mine.
What exact Pentax 800 do you have?

Thanks,
barondla
08-16-2021, 07:58 PM - 1 Like   #6
Site Supporter
Site Supporter




Join Date: Jun 2020
Posts: 97
Original Poster
the mortar-sized 800/4
08-16-2021, 10:02 PM - 1 Like   #7
Loyal Site Supporter
Loyal Site Supporter




Join Date: Sep 2006
Location: midwest, United States
Photos: Gallery | Albums
Posts: 5,625
QuoteOriginally posted by dkpentax Quote
the mortar-sized 800/4
Found this in a pdf on my tablet. Couldn't figure out any way to copy and paste it. So I took a Picture of the screen using a Pentax Q. Hope it helps.

Thanks,
barondla

Attached Images
View Picture EXIF
PENTAX Q  Photo 
08-17-2021, 07:45 AM   #8
Loyal Site Supporter
Loyal Site Supporter




Join Date: Dec 2017
Photos: Gallery | Albums
Posts: 1,095
QuoteOriginally posted by barondla Quote
Found this in a pdf on my tablet. Couldn't figure out any way to copy and paste it. So I took a Picture of the screen using a Pentax Q. Hope it helps.

Thanks,
barondla
Very good! This diagram could fill in the missing data in the lens review section. Try to find a way to send the PDF to Adam, or extract it to a real PC running software that can copy portions of Acrobat files, or even take screen shots. At a minimum, a Linux Mint basic build can do these things.
08-17-2021, 07:24 PM   #9
Site Supporter
Site Supporter




Join Date: Jun 2020
Posts: 97
Original Poster
can you post the front page of the pdf so I can look around in eBay and see if a real brochure is for sale somewhere?
08-18-2021, 03:38 PM - 2 Likes   #10
Loyal Site Supporter
Loyal Site Supporter




Join Date: Sep 2006
Location: midwest, United States
Photos: Gallery | Albums
Posts: 5,625
QuoteOriginally posted by dkpentax Quote
can you post the front page of the pdf so I can look around in eBay and see if a real brochure is for sale somewhere?
Not a brouchure. From a dealer notebook. Here is the address: https://pacificrimcamera.com/rl/01236/01236.pdf . This camera company has lots of amazing historical info on file.
Good luck,

Thanks,
barondla

Last edited by barondla; 08-19-2021 at 05:24 AM.
08-28-2021, 04:33 PM   #11
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 1,247
User's manual

What you are looking for, looks like this. It is a user's manual. This one has the older lens cross sections, including the 800 f/4. This one is from the end of 1988. It came with my new camera.
Attached Images
View Picture EXIF
DSC-RX100  Photo 
08-29-2021, 07:18 AM - 1 Like   #12
Loyal Site Supporter
Loyal Site Supporter




Join Date: Dec 2017
Photos: Gallery | Albums
Posts: 1,095
If only our cameras remained pristine with use and photos of the cameras, like that above, gained all of the scratches like the "Picture of Dorian Gray."
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, 6x7, 6x7 lens diagrams, brochure, camera, element, lens, lenses, medium format, pentax 6x7 lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax vs Tamron 24-70 : Optical diagrams house Pentax SLR Lens Discussion 44 09-17-2021 08:07 PM
Spotmatic F circuit diagrams brint c Maintenance and Repair Articles 4 06-15-2021 02:04 PM
6x7 Brochure Lord Lucan Pentax Medium Format 9 08-28-2020 03:53 PM
Lens Construction Diagrams Sought bclaff Pentax SLR Lens Discussion 8 06-30-2020 09:29 AM
Old 6x7 Brochure Lord Lucan Pentax Medium Format 9 01-28-2020 11:28 AM



All times are GMT -7. The time now is 05:03 AM. | 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