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  1. Put this on your rangefinder and try to focus it...36" f4 beast
  2. Hexanon lenses on Leicas
  3. Why does Medium Format look so different to 35mm?
  4. Help with filter factors!
  5. Your favorite/best filter for B&W photography?
  6. Interesting Zeiss Article about Tessar Design
  7. 21mm lenses
  8. Close up lenses and MFD
  9. When you think 1:1 is fast....
  10. classic optical formula
  11. Cine Lenses - Cooke, Zeiss etc
  12. Acmaxx Lens Armor?
  13. Summitar and Thorium versa Uranium Prints
  14. Super Fast Super Wide is not for rangefinders?
  15. Filters on Single coated lenses
  16. retrofocus lenses and RFs...
  17. Rodenstock vs Schneider vs Pentax Loupes
  18. Lens condition
  19. Lens Coatings and Colour Response
  20. Is this flare?
  21. Does anyone still use shift lenses?
  22. Why use a fast 50mm?
  23. which 21mm cv viewfinder for accuracy?
  24. Post your images taken with a 19mm~21mm lens
  25. Is this Haze, Condensation, or Coating damage?
  26. recommend me a nice slide projector
  27. Crop factor wins again
  28. Why The Plague of Longitudnal CA
  29. Contax G 35mm planar vs Hexar AF lens
  30. "Aperture chameleons"
  31. Rainbow Imaging "Wide Band Fader" adjustable ND filter
  32. Must have software for lens geeks
  33. shooting f4 with misalligned rf
  34. lens mount question
  35. Focus chart for rangefinder cameras (just print and test)
  36. fast flare free 35s
  37. How Many Photons in a Photograph
  38. There's something about the 50mm FOV...
  39. Why convertable lenses (frt interchang / bak fixed)
  40. Lens contrast: does is many any difference?
  41. W/NW 90 mm Minolta Rokkor-M
  42. bronica RF645 lenses not sharp! (diffraction test)
  43. CV 15mm vs. Velvia 50
  44. so I tried to set my RF according to the Nokton 35 and...
  45. HELP! Haze in lens, should I return? Pics inside
  46. M3 with delaminated finder experiment
  47. importance of a lens shade
  48. Filter Question- Yellow and Polarizer
  49. Need help! FotoDiox adapters
  50. What is up with this lens?
  51. Uncoated lenses
  52. It's not sharp...or is it?
  53. Bokeh and wide open performance of Heliars, Planars, Tessars, Triotars
  54. Lens with Perfect Circular Diaphragm stop down
  55. Steinheil-Munchen lenses = dating by serial # ?
  56. The highest quality for cost 50mm's
  57. what are various RF registers?
  58. X ray lenses those Exotic 0.75 and 0.95s KOWA etc
  59. measuring lines / mm at film
  60. aperture blades at 35 mm and MF lenses
  61. F3.5 100mm Canon Lens Formula
  62. Favorite 40?
  63. Should I send this Canon 50/1.8 back
  64. Perspective Distortion of Telephoto Lenses across Formats?
  65. LTM->m mount adapter question
  66. Correcting Distortion
  67. What kind of wide angle lens is resistant to flare?
  68. shaeper
  69. Replacing an Aspherical Element?
  70. Sold 2 lenses, bought 2 lenses
  71. Carl Zeiss Jena 8.5cm Triotar - but what does it fit?
  72. why are f-stops 2, 2.8, 4, 5.6, 8, 11?
  73. Why get such a fast 50mm? 50mm f1.2 vs f1.4
  74. what is the deal with chromatic aberration?
  75. What am I looking at? and how do I find more... (image intense)
  76. controlling perspective with a 28mm
  77. Help with my lens
  78. Can this be fixed (Reasonably) ?
  79. Separation or haze - that's the question
  80. Stuck adapter or M mount ?
  81. What cameras use Series Filters?
  82. LSM (M39) lens on Leica M6
  83. Bubbles or Leica Glow ?
  84. Long Lenses and DOF
  85. low contrast vs high contrast lenses on B&W film
  86. The year is 1954....
  87. diopter question
  88. Leica Lens Making Video
  89. Turret viewfinders
  90. Need Help/Feedback Please: Rear Element-Can this be cleaned up?
  91. 40mm and a 50mm?
  92. focus shift - please explain it
  93. Lens focussing errors
  94. Viewfinders of film P&S cameras: normal vs big
  95. This question pre-supposes the existence of "Leica Glow."
  96. What FL for RF vs. SLR
  97. Zeiss and Schneider designs, same?
  98. Useing my analog lens on my digicam?Is an f2 better than an f4?
  99. Budget Glass Hall of Fame
  100. Tiffen filter why uncoated, any advatage?
  101. Lens decementing and coating damage problem
  102. How is shutter speed defined really?
  103. dust
  104. Mind your Focus Shift...
  105. Hood and filter question
  106. Fixing that old glass
  107. What's your favourite lens on the Nex-5n?
  108. Loose retaining rings in B+W filters
  109. Beginner with Pentax Loupe question
  110. Is this real?
  111. 1:1 Macro Lens on APS-C Sensor
  112. Want to try filters - need a 'for dummies'
  113. Fast old wides for DSLR
  114. Industar-50, Collapsible vs Rigid depth
  115. ferider-adapted smc pentax-m 50/1.4 ...
  116. Review: ferider modified Pentax 50/1.4 in M-mount adapter
  117. developments in autofocus technology
  118. FSU LTM need adjustment for M mount?
  119. Filters
  120. How to Calculate Crop Factor, F-Stops, and Equivalent Lenses
  121. Avenon/Kobalux 21mm pouch?
  122. How far away is infinity? (optically speaking, of course)
  123. Some lenses tested on a Chinese website
  124. Will having camera in gym locker affect lens? Moisture?
  125. 'C' mount lenses
  126. Why is 24/25mm better than 28mm?
  127. Does your Summicron focus-shift?
  128. Flat lens offers distortion free images
  129. What did you do with your high end enlarging lenses?
  130. Fader ND filters
  131. How to figure out flange focal distance? [Focomat 2c]
  132. 15mm vs. 21mm
  133. What if
  134. fotodiox adaptors for EOS EF-M mount
  135. What's better than Autofocus and manual focus?
  136. so How Different/Similar is a Leica R Lens to an M
  137. Which 50mm!?!?!
  138. Do you mix and match your lens brands?
  139. Lens wisdom of the day (the century)
  140. Barry Lyndon Zeiss 0.7/50 write-up
  141. 50mm with character?
  142. why do elements seperate?
  143. why can't you evaluate flare and bokeh in the viewfinder?
  144. Helicoid 13-17mm to short.
  145. What to do with hazy lenses
  146. Lenses for Curved Screen Projection
  147. Does it make sense to replace single 35 with 28 + 50?
  148. ID this mount?
  149. Focus accuracy on film vs. digital
  150. focus shift basic question
  151. Best 21mm lens for infrared photography
  152. 'Front cell' vs 'unit' focussing
  153. Differences in lens characteristics and performance
  154. Elmar Vs. Tessar or why did the Tessar conquer the world?
  155. 40mm lenses: why are they so small?
  156. DIY 35mm lens test on Fuji, Summilux and Summicron
  157. A fuzzy question
  158. Cooke Triplet lens - any for M's
  159. Film lenses and mirrorless digital
  160. sonnars and focus shift
  161. Low Contrast Lens:High Contrast Scene?
  162. Fast Sonnar Clone Shootout - Canon, Jupiter, Nikkor
  163. Radioactive lenses and Geiger counter
  164. Tessar (type and triplet) front element focusing - focus shift
  165. Determining Lens Hood Dimensions
  166. The making of a custom lens mount
  167. how to check for vignetting (from hood/filters)
  168. Front cell focusing revisited
  169. Can I see "bad" bokeh...
  170. has anyone converted their Hexar AF lens to M-mount?
  171. Stepless aperture lenses
  172. Kubrick exhibition at LA County Museum
  173. Soft or Sharp
  174. What lens type causes the "circular" blur/bokeh?
  175. f/22 & f/32?
  176. What dipoter do I need?
  177. Do you try to match signatures with your lens kits?
  178. Crop question....
  179. uv/ir on film cameras?
  180. Petzval Lens
  181. Extending Eye Relief
  182. BBC: The Perfect Lens
  183. Make a correction table for your rangefinder.
  184. Impact of aperture on distortion. I don't get it!
  185. Agonizing about lenses: 4 friends in their 50s
  186. Lens Internal Crack (Delamination)
  187. 35/1.4 shootout - Nokton MC vs SC vs Summilux FLE vs Canon LTM
  188. Colour vs B&W: why is there any difference?
  189. DIY Lens Testing Help
  190. "Rendering" vs Sharpness
  191. Film and digital resolution compared
  192. Best 50mm for f8-f16
  193. About aperture and shutter.
  194. 21mm vs 25mm distortion on a 1.5 crop factor sensor
  195. Vignetting: Is it a dirty word?
  196. Sony Lens Designer Discusses FE Design
  197. Summicron 35mm v4 vs. Asph
  198. Sony Curved FF Sensor
  199. What is going on here? Chromatic Ab? Flare? (Tessar photo attached)
  200. "Who killed infinity focus"
  201. Why is f/2 dimmer than f/2.8 on a Zuiko lens?
  202. Does the glass matter?
  203. the right cement for doublets
  204. "Old" lenses difference for b/w film scans and prints.
  205. Is dust bad?
  206. Speaking about design, what does close to zero distortion imply?
  207. Rangefinder equivalent base length for critical focus
  208. How drastically protected are old lenses' designs?
  209. & normal Pentax K mount lenses compared for bokeh.
  210. Is there a filter that will "create" B+W images on color film?