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S-M-C Reflex-Takumar 6x7 1000mm F8 Review RSS Feed

S-M-C Reflex-Takumar 6x7 1000mm F8

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1 16,298 Sun May 22, 2011
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S-M-C Reflex-Takumar 6x7 1000mm F8
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Description:
The longest telephoto lens Pentax made for the 6x7 cameras. It is relatively compact since it is a reflex design. The field of view of a 1000mm lens on a 6x7 camera corresponds to a 500mm lens on a 24x36mm camera: 4 degrees horizontally. The weight is 6.6 kg.

Super-Multi-Coated REFLEX-Takumar 6x7 1000mm F8
© www.pentaxforums.com, sharable with attribution | Check camera compatibility
Image Format
6x7
Lens Mount
Pentax 6x7
Aperture Ring
No
Diaphragm
None
Optics
9 elements, 6 groups
Mount Variant
Inner Bayonet
Check camera compatibility
Max. Aperture
F8
Min. Aperture
F8
Focusing
Manual
Min. Focus
3500 cm
Max. Magnification
0x
Filter Size
Internal Focus
No
Field of View (Diag. / Horiz.)
5.1 ° / 4.0 °
Hood
Built-in, slide out
Case
Lens Cap
Coating
SMC
Weather Sealing
No
Other Features
Built-in Filters,Built-in ND Filter,Tripod Mount,Fixed Aperture
Diam x Length
180 x 352 mm
Weight
6600 g
Production Years
1971 (start of production)
Notes
Engraved name: REFLEX-TAKUMAR/6x7 1:8 1000mm
User reviews
Built-in skykight, R2, Y2, and ND filters
Features:
Manual FocusAperture RingMedium-Format SupportAdapter needed for DSLRsDiscontinued



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Author:
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Pentaxian

Registered: February, 2009
Location: Arizona
Posts: 1,035

6 users found this helpful
Lens Review Date: May 22, 2011 I can recommend this lens: Yes | Price: N/A | Rating: N/A 

 
Pros: Small size for a long focus lens
Cons: No diaphragm

This post is a review for informational purposes, as I don't own this lens. The 1000mm Reflex-Takumar is probably the rarest lens for the Pentax 67 system. There is also very little information about it. This mirror lens has a 7 inch diameter and weighs just slightly more than the 600mm f/4 Takumar; not bad for a 1 meter focal length lens. As one would expect, it is for use on the outer bay of the P67 lens mount. There is no diaphragm, which is typical for mirror lenses. It is set at f/8 which is determined by its optical design. I have a background in optics and I must say that I have never seen a design like this lens. It is obviously a Maksutov Cassegrain from the telescope world, however it does not resemble any known type in that category. Instead of having a meniscus up front as the first element, it has a weak positive element, followed by a meniscus. The slightly converging light beam reflects off of a concave mirror (probably spherical) and then to the secondary mirror that is attached to the meniscus. From there, light is passed through a hole in the primary mirror and through the rear lens group. There are two mirrors and seven refracting elements. Focusing is done via large knobs, just like the 600 Takumar. This lens comes with built-in ND, Skylight, Y2 and R2 filters that can be rotated into place. Exposure can only be changed by the ND filter and shutter speed, since this lens has no diaphragm. Because of this, DOF changes are impossible. This lens is best suited for narrow focus subjects like birds or mammals at distance, although certain near infinity shots could be had as well. Since Pentax has stopped producing these lenses, I have only seen one for sale on the used market. The price of this lens when new was $5900. US.
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