Tele-Congo 240mm f6.3 filter thread size?

[monkeymon]

Does someone here know the filter thread size of tele-congo 240mm f6.3 lens?

[Gem Singer]

Congo does not list a f6.3 Tele-240 on their website. 300mm seems to be the shortest tele they make.

However, they do list a Commercial Congo f6.3 240 that takes 55mm screw-in filters.

[monkeymon]

Congo does not list a f6.3 Tele-240 on their website. 300mm seems to be the shortest tele they make.

However, they do list a Commercial Congo f6.3 240 that takes 55mm screw-in filters.

I know, i checked the web page. But it's Tele-Congo 240mm f6.3 not Commercial Congo...

[Gem Singer]

Do you actually have the lens in hand?

Is it labeled Tele-Congo on the lens barrel?

It appears that Yamasaki doesn't make a f6.3 240 Tele-Congo.

In some parts of the world, long lenses are mistakenly called "tele".

A 240 is considered to be a long lens for 4x5.

[monkeymon]

Do you actually have the lens in hand?

Is it labeled Tele-Congo on the lens barrel?

It appears that Yamasaki doesn't make a f6.3 240 Tele-Congo.

In some parts of the world, long lenses are mistakenly called "tele".

A 240 is considered to be a long lens for 4x5.

It's labeled tele-congo as i said... maybe they don't make 'em any more.

If you so skeptic, just google it... you can find many images and posts about it, but nothing about it's filter size.

http://image.xitek.com/exchange/upload/235/23561/j1.jpg

http://www.chinaphotography.com/foru...d710e02dc89644

And no, i'm waiting it to arrive.. if i had it, i could just measure the filter thread. But to save time, i thought i could ask and maybe order the required step up ring forehand.

[Gem Singer]

I wasn't doubting your word. Just attempting to help you out.

I'll know better the next time. Best of luck on your purchase.

[monkeymon]

Congo does not list a f6.3 Tele-240 on their website. 300mm seems to be the shortest tele they make.

However, they do list a Commercial Congo f6.3 240 that takes 55mm screw-in filters.

It actually seems that Tele-Congo 240mm f6.3 IS Commercial Congo 240mm f6.3. It's not a tele lens at all, it's a tessar! I'm kinda putting this information up as a future reference, there is not much information on this lens. And i was fooled by the Tele-Congo label. After figured it needed lots of bellows for a tele lens, ended up checking it more closely and realizing that it's actually a tessar construction.

I thought i had a nice multi coated tele lens, now i have a nice multi coated tessar.. but i needed a tele. Hah.

[Maris Rusis]

I used to sell Congo lenses back in the 1980s and my old pricelists and specification sheets reveal:

Tele Congo 240mm f6.3 for the 5"x7" format is a four element three group lens and was available in Electric #1, Copal #1, and Press#1 shutters and I was asking $659.00ea in the Copal #1 shutter. Technical data:

Smallest f stop 64.
Angle of view 50 degrees.
Image circle at f 16 is 220mm.
Front diameter 57mm.
Rear diameter 52mm.
Length of lens 78mm.
Flange to rear of lens 34mm.
Flange focal length 232mm.
Rear of lens to (infinity) image 201mm.
Front filter size 52mm.
Weight in Copal #1 shutter 385 grammes.
Catalogue number in Copal#1 shutter is #177.

[AtlantaTerry]

Does someone here know the filter thread size of tele-congo 240mm f6.3 lens?

Sitting next to my keyboard is a lens mounted in a Crown Graphic lensboard that says:
Tele-Congo
1:6.3
f=240mm
Yamasaki
No.13831x
Lens Made In Japan
Copal Press #1 shutter
smallest aperture: f/64
front filter size: 55mm (currently a 55mm multi-coated UV filter is screwed in)
rear filter: no threads available

[monkeymon]

I used to sell Congo lenses back in the 1980s and my old pricelists and specification sheets reveal:

Tele Congo 240mm f6.3 for the 5"x7" format is a four element three group lens and was available in Electric #1, Copal #1, and Press#1 shutters and I was asking $659.00ea in the Copal #1 shutter. Technical data:

Smallest f stop 64.
Angle of view 50 degrees.
Image circle at f 16 is 220mm.
Front diameter 57mm.
Rear diameter 52mm.
Length of lens 78mm.
Flange to rear of lens 34mm.
Flange focal length 232mm.
Rear of lens to (infinity) image 201mm.
Front filter size 52mm.
Weight in Copal #1 shutter 385 grammes.
Catalogue number in Copal#1 shutter is #177.

This kinda verifies what i thought, it's actually just a Commercial Congo 240mm f6.3 with a Tele-Congo name on it. Not a tele lens at all, but a tessar. The real tele lenses Congo has, starts from 300mm.

http://www.cosmonet.org/congo/spec_e.htm

The specs you gave, are identical to the listed specs on Commercial Congo 240mm f6.3 lens.