I am - for the time being - at odds*** with this Pentax 67 200mm lens. Indoors, i noticed a strong vulnerability to stay light. Despite the light in question was of soft character and not even directed towards the camera... yet it would create very strong interfering glare in the left of the image. Even stopped down to ƒ 9.5 and with a narrow lens hood on - the glare was still visible.

 

 

Weird Flare sensitivity

had to use my hand putting it close to the left side of the lens, in order to finally get rid of the glare. Weird. It would be a larger image circle in this lens, creating extra sensitivity to any kind of extra light coming from the side ? So, I don't know why it does that... (could it be the adapter ? But then other lenses would be affected from it, too. Internal reflection due to a larger image circle compared to the much smaller GFX sensor ?) Perhaps it was a special type of glare from the near by LED ?

I don't know.

Outdoors, I made a few photos during night time - and they are all fine. The sharpness was fine too, albeit i didn't really see much difference between wide open ƒ4 and stopped down to ƒ11.

Like with almost all Pentax 67 lenses, they all exhibit green/red fringing in details and background blur, when used wide open.

*** It is the much larger image circle of the Pentax 6x7 lenses which is the culprit of that i get stay light.(Or the adapter in regard isn't as deep-black inside as it should be)

Which isn't so strange given that it shows more outside of the sensor area, and could easily lead into internal reflections. Either in the Fuji body, or/and in the adapter as well. I also got the same flare effect with the Pentax SMC 90/2.8 lens, too - if a stronger light source was (what i thought) outside of the frame, but still too close or partially within the real 7x7 cm image circle.



 

I'll have to take more images

As I said. I am for now a bit at odds with this 200mm lens. Yet, it is a relative "modern" film lens for the Pentax 67 line up of lenses, starting in 1986. There are two older Takumar versions, one from 1969 to 1971, and the other from 1971 to 1986. Both featuring only 4 elements, 4 groups.

The latest version from 1986 and onwards, exhibits 5 elements in 4 groups, being the better optical formula.



Pentax 6x7 Super-Takumar 105 mm ƒ2.4

A lovely lens. It simply is. Beautiful bokeh, gentle transitions, and a good sharpness that even can be used at wide open aperture. Especially for portraits. Actually, it even works with color portraits.

Again, it doesn't vignette, which at times can make the image look "boring" (in my opinion), because nothing subtle "limits the eyes from wandering off / out of the image". Other times, with the right content, it can create a cleanness that is desired in more "clinical images", studio or "clean kitchen" / Product / clean environment type of photography.


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