Looking for Pentax 6x7 lens diagrams in a brochure

**dkpentax** · 08-14-2021, 02:55 PM

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.

**barondla** · 08-14-2021, 07:50 PM

Originally posted by dkpentax

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

**gofour3** · 08-15-2021, 11:37 AM

Here's most of them from a website:

6x7 Normal

6x7 Telephoto

6x7 Wide

Phil.

**dkpentax** · 08-15-2021, 08:14 PM

those pages show every lens except mine.

**barondla** · 08-15-2021, 10:43 PM

Originally posted by dkpentax

those pages show every lens except mine.

What exact Pentax 800 do you have?

Thanks,
barondla

**dkpentax** · 08-16-2021, 07:58 PM - **1 Like**

the mortar-sized 800/4

**barondla** · 08-16-2021, 10:02 PM - **1 Like**

Originally posted by dkpentax

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

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**kaseki** · 08-17-2021, 07:45 AM

Originally posted by barondla

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.

**dkpentax** · 08-17-2021, 07:24 PM

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?

**barondla** · 08-18-2021, 03:38 PM - **2 Likes**

Originally posted by dkpentax

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

desertscape · 08-28-2021, 04:33 PM

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.

**kaseki** · 08-29-2021, 07:18 AM - **1 Like**

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."

08-14-2021, 02:55 PM	#1
dkpentax Site Supporter Join Date: Jun 2020 Posts: 132	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.

08-18-2021, 03:38 PM - 2 Likes	#10
barondla Site Supporter Join Date: Sep 2006 Location: midwest, United States Photos: Gallery \| Albums Posts: 5,714	Originally posted by dkpentax 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.

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08-14-2021, 07:50 PM	#2
barondla Site Supporter Join Date: Sep 2006 Location: midwest, United States Photos: Gallery \| Albums Posts: 5,714	Originally posted by dkpentax 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
gofour3 Site Supporter Join Date: Oct 2008 Location: Vancouver, Canada Posts: 8,091	Here's most of them from a website: 6x7 Normal 6x7 Telephoto 6x7 Wide Phil.

08-15-2021, 08:14 PM	#4
dkpentax Site Supporter Join Date: Jun 2020 Posts: 132 Original Poster	those pages show every lens except mine.

08-15-2021, 10:43 PM	#5
barondla Site Supporter Join Date: Sep 2006 Location: midwest, United States Photos: Gallery \| Albums Posts: 5,714	Originally posted by dkpentax 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
dkpentax Site Supporter Join Date: Jun 2020 Posts: 132 Original Poster	the mortar-sized 800/4

08-17-2021, 07:45 AM	#8
kaseki Loyal Site Supporter Join Date: Dec 2017 Photos: Gallery \| Albums Posts: 1,138	Originally posted by barondla 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
dkpentax Site Supporter Join Date: Jun 2020 Posts: 132 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?

08-29-2021, 07:18 AM - 1 Like	#12
kaseki Loyal Site Supporter Join Date: Dec 2017 Photos: Gallery \| Albums Posts: 1,138	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."