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