Forgot Password
Pentax Camera Forums Home
 

Review statistics for desertscape
Lenses Added 0  (View Lenses Added)
Reviews Posted 22  (View Reviews)
Latest Review Posted SMC Pentax 67 / SMC Pentax-6x7 75mm F4.5 Shift
I bought this lens as a replacement for my 75 Takumar. I wanted the f/32 ability and the shift, as the old Takumar was limited in DOF and perspective control. It seems to be just as sharp as the 75 Takumar when unshifted and doesn't degrade much when shifted.


The lens design is a 9 element type with thick central elements that has Biogon heritage. Its cross section has similarities to the second version 55mm. The number of elements was increased to 9 (vs the 5 in the Takumar) primarily due to this lens being used off axis when shifting. Off axis aberrations become huge when any lens is used off axis, so more elements are needed to compensate. I have not seen any lateral color with this lens, as it is color corrected very well.


This lens does not have an AUTO/Man switch, as it has a manual diaphragm and therefore does not have wide open metering. But the use of 2 diaphragm rings only confuses matters. They should have used just one, like the other manual lenses to keep things consistent. I turn them both at the same time, treating them as one. This lens will meter in the shifted mode when using the TTL prism. There is light loss when shifting because off axis light is spread thinner than on axis light. This is similar to winter light on Earth striking at a low angle and not warming the planet as much.


Most people will use the shift in the vertical mode for trees, buildings, tall cactus etc. It will however shift in many different orientations though. I use it unsh...



All times are GMT -7. The time now is 04:23 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