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Pentax 67 SLR question and answer forum
35mm Fisheye rear holder mirror clearance?
F-stops on 90mm
35mm fisheye rear filter holder?
Differences between latest and SMC Takumar 35mm fisheye?
Questions about Pentax 800 mm/6.7 ED lens
Changing aperture with DOF preview enabled
Pentax 2X vs. 1.4X test
55-100mm with 2X converter vs 90-180mm
User's opinions of 67's 500 f5.6
55 F3.5, filter modification
repair source of 67 90 2.8 LS lens
Bokeh Of Pentax 67 Lenses
35mm Rectilinear/Aspherical Design Sent to Pentax
90-180 + 2x Converter Can Yield f/90 DOF
Pentax 67 third party lenses
400mm f/4 ED(IF) Test
6x7 Lenses: Value / Second hand prices
what is the difference between SMC and Takumar?
which lens for cityscapes and people? pentax 67
P 645 600 5.6 EDIF manual focus
1.4 converter on a 400EDIF
200mm Lens - Versions and Age
darkroom health hazards
leaf shuter lenses
new 75mm f2.8
135mm macro or 100mm macro
90 LS Problem
600mm f/4 Redux
Pentax 500mm f4.5 lens does exist???
Cross Sections-New Lenses
close focusing with long takumars
Dust in interior of new pentax lens
Sharpness at Infinity-- Hyperfocal VS Infinity Focus
Recommedation on 200mm lens for P67
Where are the "Russians"?
165 2.8 or 200 f4 w/extenders
New Pentax 67 lenses
Lens focal length, perspective and film format
New wide angle for P67?
Want user's manual of 90mm LS
Zoom for Macro?
600mm & Wimberley Head
P67 lenses: Hasselblad Ealing MTF tests on...
55-100mm Zoom Hyperfocal Marks for f/32?
400mm Takumar (older model)
Image circle of 55mm/panorama with AP67
Lenses for Asahi Pentax
Diffraction and How it Will Affect Sharpness @ f/45
105 VS 135 Comparison with Helicoid
Modifying Lenses for Smaller Stops
Pentax 67 Standard Lenses
135-f4.0 Macro--Tubes or Close-up Lenses
150mm Serial Number
Focusing Ring Slippage on 135 macro
Diffraction Limited Optics
Use of 2x converter with various lenses.
Takumar on 4x5"
Look at this!
Actual DOF of 75mm Shift
Use of Converters as a DOF Tool
Rear Filter Reflections
165mm LS Clarification
Large Format Lenses on Pentax 67
LS Lenses and shutter vibration
depth of field
Using the 400mm for Portraits
Loose casing on 45mm lens...???
Cokin P holder for Pentax 55-100MM lens; what are my options
converting a 400mm f/2.8 to P67 mount
Repair of 90mm Leaf Shutter lens?
45mm out of focus?
Need hints for aerial photography
135 mm Macro Pentax 67 for portaiture
Why are AP67 lenses so big?
150mm Takumar/Super Takumar Design
Front Filter for the 400 Takumar
Distortion Pattern of 55mm f4
Using LF lenses on a P6x7
Colour cast of 75mm shift lens
How does the 165mm LS lens work with auto metering
Using a 67 200 f/4 + adapter on a 35mm body
Pentax 67 120 Soft Focus lens
What wideangle would you pick if you already had the 75mm?
Questionable Lens Redesign Philosophy
Using a 45/5 Lens on 4x5
200mm Macro Lens
loose lense shade
Optical Aberrations VS Shutter Vib.
Setup for a lines-per-millimeter resolution test
Best Value in the P67 Lens Line?
New 300mm Cross Section
How Do I Use the 2x Converter Properly?
Lens Serial #s and Year of Production
300mm EDIF is now released into the marketplace
"Sweet spot" of Ptx. 75mm and 105mm lenses
Pentax 67 500 f4 Lens
Two Tips- Lens Mounts and Rear Filters
Ever heard of the Pentax 67 105/2.5?
Can we convert the Kiev/Pentacon 30mm Fisheye to P67 mount
Using 67 lenses on K mount body
SMC 400 f/4 EDIF pricing
Color Fringing on 400 Takumar?
Best lens or lens/tube(s) for headshots
What is 'overhang'?
What about the one and only ZOOM for P67 ?
Has there been any optical changes to the 135 macro?
Lens Performance-Wide Open
New 300mm ED With f/32 Min.
Lens Build Quality Differences
New Pentax 67 user-advise re lenses
Super Takumar Coating
Filters for 45 f4 normal or wide?
New 300/4 lens!
DOF scale etc with 150mm f/2.8
Sharpness of new 55/4
55 and 90 or new 55 to 100 zoom
75 shift lens DOF
Experience with 120 soft focus lens ?
55mm vs 45mm
55mm f4 old vs 55mm f4 new
Pentax 100mm Macro Versus 105mm f/2.4
Smaller stops on 67 lenses
Teleconverters with 600mm f4
Beware Pentax 67 Lens Prices
100 macro with extension tubes
100 f/4 with rear converter
DOF markings on 90 and 45mm lenses
Distortion in Rectilinear vs Fisheye
Lens Design Similarities Between Companies
Pentax lenses and extension tubes
Pentax 67 lenses on Pentax 645?
Optics - wide open
Leaf Shutter lens question
200mm f/4 -- lots of flare ?
Unsymmetrical aperture on 55/4 lense
Pentax 67 lenses compared to Hasselblad lenses
General question on optics: what makes a macro lens so special in terms of optical quality?
Wide Angle Lenses Categorized
Leica 180mm comparison with P67 200mm
Does front element rotate in P67 lenses?
Lenses for 67
165/2.8 vs. 165/4 LS
Anyone Know the Close Focus Distance-600mm With Ext Tube?
Takumar or Pentax 300mm
200mm Pentax Optical Cross Section
older Pentax 400mm
75 mm Shift lens
Pentax 6x7 1.4x vs. 2x teleconverter
P 6x7 for astrophotography
Sharpness Comparison--P67 Lenses
Two versions of 165 f2.8 - anybody know the difference?
135 macro lens v. tubes
135 macro limitations as a "standard" lens
What telephoto lens to buy?
Old vs. New 45mm,55mm
P67 165 LS lens opinions wanted
Optical tests of Pentax67 optics
PTX 67 165 LS LENS ?
Lenses for landscape and wildlife photography
90MM Leaf Shutter usage
Moderation questions? read