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  1. Help with filter factors!
  2. Your favorite/best filter for B&W photography?
  3. Interesting Zeiss Article about Tessar Design
  4. 21mm lenses
  5. Close up lenses and MFD
  6. When you think 1:1 is fast....
  7. classic optical formula
  8. Cine Lenses - Cooke, Zeiss etc
  9. Acmaxx Lens Armor?
  10. Summitar and Thorium versa Uranium Prints
  11. Super Fast Super Wide is not for rangefinders?
  12. Filters on Single coated lenses
  13. retrofocus lenses and RFs...
  14. Rodenstock vs Schneider vs Pentax Loupes
  15. Lens condition
  16. Lens Coatings and Colour Response
  17. Is this flare?
  18. Does anyone still use shift lenses?
  19. Why use a fast 50mm?
  20. which 21mm cv viewfinder for accuracy?
  21. Post your images taken with a 19mm~21mm lens
  22. Is this Haze, Condensation, or Coating damage?
  23. recommend me a nice slide projector
  24. Crop factor wins again
  25. Why The Plague of Longitudnal CA
  26. Contax G 35mm planar vs Hexar AF lens
  27. "Aperture chameleons"
  28. Rainbow Imaging "Wide Band Fader" adjustable ND filter
  29. Must have software for lens geeks
  30. shooting f4 with misalligned rf
  31. lens mount question
  32. Focus chart for rangefinder cameras (just print and test)
  33. fast flare free 35s
  34. How Many Photons in a Photograph
  35. There's something about the 50mm FOV...
  36. Why convertable lenses (frt interchang / bak fixed)
  37. Lens contrast: does is many any difference?
  38. W/NW 90 mm Minolta Rokkor-M
  39. bronica RF645 lenses not sharp! (diffraction test)
  40. CV 15mm vs. Velvia 50
  41. so I tried to set my RF according to the Nokton 35 and...
  42. HELP! Haze in lens, should I return? Pics inside
  43. M3 with delaminated finder experiment
  44. importance of a lens shade
  45. Filter Question- Yellow and Polarizer
  46. Need help! FotoDiox adapters
  47. What is up with this lens?
  48. Uncoated lenses
  49. It's not sharp...or is it?
  50. Bokeh and wide open performance of Heliars, Planars, Tessars, Triotars
  51. Lens with Perfect Circular Diaphragm stop down
  52. Steinheil-Munchen lenses = dating by serial # ?
  53. The highest quality for cost 50mm's
  54. what are various RF registers?
  55. X ray lenses those Exotic 0.75 and 0.95s KOWA etc
  56. measuring lines / mm at film
  57. aperture blades at 35 mm and MF lenses
  58. F3.5 100mm Canon Lens Formula
  59. Favorite 40?
  60. Should I send this Canon 50/1.8 back
  61. Perspective Distortion of Telephoto Lenses across Formats?
  62. LTM->m mount adapter question
  63. Correcting Distortion
  64. What kind of wide angle lens is resistant to flare?
  65. shaeper
  66. Replacing an Aspherical Element?
  67. Sold 2 lenses, bought 2 lenses
  68. Carl Zeiss Jena 8.5cm Triotar - but what does it fit?
  69. why are f-stops 2, 2.8, 4, 5.6, 8, 11?
  70. Why get such a fast 50mm? 50mm f1.2 vs f1.4
  71. what is the deal with chromatic aberration?
  72. What am I looking at? and how do I find more... (image intense)
  73. controlling perspective with a 28mm
  74. Help with my lens
  75. Can this be fixed (Reasonably) ?
  76. Separation or haze - that's the question
  77. Stuck adapter or M mount ?
  78. What cameras use Series Filters?
  79. LSM (M39) lens on Leica M6
  80. Bubbles or Leica Glow ?
  81. Long Lenses and DOF
  82. low contrast vs high contrast lenses on B&W film
  83. The year is 1954....
  84. diopter question
  85. Leica Lens Making Video
  86. Turret viewfinders
  87. Need Help/Feedback Please: Rear Element-Can this be cleaned up?
  88. 40mm and a 50mm?
  89. focus shift - please explain it
  90. Lens focussing errors
  91. Viewfinders of film P&S cameras: normal vs big
  92. This question pre-supposes the existence of "Leica Glow."
  93. What FL for RF vs. SLR
  94. Zeiss and Schneider designs, same?
  95. Useing my analog lens on my digicam?Is an f2 better than an f4?
  96. Budget Glass Hall of Fame
  97. Tiffen filter why uncoated, any advatage?
  98. Lens decementing and coating damage problem
  99. How is shutter speed defined really?
  100. dust
  101. Mind your Focus Shift...
  102. Hood and filter question
  103. Fixing that old glass
  104. What's your favourite lens on the Nex-5n?
  105. Loose retaining rings in B+W filters
  106. Beginner with Pentax Loupe question
  107. Is this real?
  108. 1:1 Macro Lens on APS-C Sensor
  109. Want to try filters - need a 'for dummies'
  110. Fast old wides for DSLR
  111. Industar-50, Collapsible vs Rigid depth
  112. ferider-adapted smc pentax-m 50/1.4 ...
  113. Review: ferider modified Pentax 50/1.4 in M-mount adapter
  114. developments in autofocus technology
  115. FSU LTM need adjustment for M mount?
  116. Filters
  117. How to Calculate Crop Factor, F-Stops, and Equivalent Lenses
  118. Avenon/Kobalux 21mm pouch?
  119. How far away is infinity? (optically speaking, of course)
  120. Some lenses tested on a Chinese website
  121. Will having camera in gym locker affect lens? Moisture?
  122. 'C' mount lenses
  123. Why is 24/25mm better than 28mm?
  124. Does your Summicron focus-shift?
  125. Flat lens offers distortion free images
  126. What did you do with your high end enlarging lenses?
  127. Fader ND filters
  128. How to figure out flange focal distance? [Focomat 2c]
  129. 15mm vs. 21mm
  130. What if
  131. fotodiox adaptors for EOS EF-M mount
  132. What's better than Autofocus and manual focus?
  133. Which 50mm!?!?!
  134. Do you mix and match your lens brands?
  135. Lens wisdom of the day (the century)
  136. Barry Lyndon Zeiss 0.7/50 write-up
  137. 50mm with character?
  138. why do elements seperate?
  139. why can't you evaluate flare and bokeh in the viewfinder?
  140. Helicoid 13-17mm to short.
  141. What to do with hazy lenses
  142. Lenses for Curved Screen Projection
  143. Does it make sense to replace single 35 with 28 + 50?
  144. ID this mount?
  145. Focus accuracy on film vs. digital
  146. focus shift basic question
  147. Best 21mm lens for infrared photography
  148. 'Front cell' vs 'unit' focussing
  149. Differences in lens characteristics and performance
  150. Elmar Vs. Tessar or why did the Tessar conquer the world?
  151. 40mm lenses: why are they so small?
  152. DIY 35mm lens test on Fuji, Summilux and Summicron
  153. A fuzzy question
  154. Cooke Triplet lens - any for M's
  155. Film lenses and mirrorless digital
  156. sonnars and focus shift
  157. Low Contrast Lens:High Contrast Scene?
  158. Fast Sonnar Clone Shootout - Canon, Jupiter, Nikkor
  159. Radioactive lenses and Geiger counter
  160. Tessar (type and triplet) front element focusing - focus shift
  161. Determining Lens Hood Dimensions
  162. The making of a custom lens mount
  163. how to check for vignetting (from hood/filters)
  164. Front cell focusing revisited
  165. Can I see "bad" bokeh...
  166. has anyone converted their Hexar AF lens to M-mount?
  167. Stepless aperture lenses
  168. Kubrick exhibition at LA County Museum
  169. Soft or Sharp
  170. What lens type causes the "circular" blur/bokeh?
  171. f/22 & f/32?
  172. What dipoter do I need?
  173. Do you try to match signatures with your lens kits?
  174. Crop question....
  175. uv/ir on film cameras?
  176. Petzval Lens
  177. Extending Eye Relief
  178. BBC: The Perfect Lens
  179. Make a correction table for your rangefinder.
  180. Impact of aperture on distortion. I don't get it!
  181. Agonizing about lenses: 4 friends in their 50s
  182. Lens Internal Crack (Delamination)
  183. 35/1.4 shootout - Nokton MC vs SC vs Summilux FLE vs Canon LTM
  184. Colour vs B&W: why is there any difference?
  185. DIY Lens Testing Help
  186. "Rendering" vs Sharpness
  187. Film and digital resolution compared
  188. Best 50mm for f8-f16
  189. About aperture and shutter.
  190. 21mm vs 25mm distortion on a 1.5 crop factor sensor
  191. Vignetting: Is it a dirty word?
  192. Sony Lens Designer Discusses FE Design
  193. Summicron 35mm v4 vs. Asph
  194. Sony Curved FF Sensor
  195. What is going on here? Chromatic Ab? Flare? (Tessar photo attached)
  196. "Who killed infinity focus"
  197. Why is f/2 dimmer than f/2.8 on a Zuiko lens?
  198. Does the glass matter?
  199. the right cement for doublets
  200. "Old" lenses difference for b/w film scans and prints.
  201. Is dust bad?
  202. Speaking about design, what does close to zero distortion imply?
  203. Rangefinder equivalent base length for critical focus
  204. How drastically protected are old lenses' designs?
  205. & normal Pentax K mount lenses compared for bokeh.
  206. Is there a filter that will "create" B+W images on color film?
  207. Is the Rokkor M 90 a scaled down Tele Elmarit?
  208. Bubbles in lens element
  209. Auxiliary Lenses for fixed lens cameras?
  210. Low frequency spatial resolution?
  211. Modern (flat) rendering vs. classic (full of character) rendering
  212. 35/1.4 shootout take II
  213. Thorium glass
  214. Fast Moderate Wides, Focus Shift and Pixel Peeping
  215. Big Nikon/Contax 50mm RF Shoot-Out, with bonus Leica/Voigtlander/SLR Lenses
  216. what does this mean to photography?