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  1. Interesting Zeiss Article about Tessar Design
  2. 21mm lenses
  3. Close up lenses and MFD
  4. When you think 1:1 is fast....
  5. classic optical formula
  6. Cine Lenses - Cooke, Zeiss etc
  7. Acmaxx Lens Armor?
  8. Summitar and Thorium versa Uranium Prints
  9. Super Fast Super Wide is not for rangefinders?
  10. Filters on Single coated lenses
  11. retrofocus lenses and RFs...
  12. Rodenstock vs Schneider vs Pentax Loupes
  13. Lens condition
  14. Lens Coatings and Colour Response
  15. Is this flare?
  16. Does anyone still use shift lenses?
  17. Why use a fast 50mm?
  18. which 21mm cv viewfinder for accuracy?
  19. Post your images taken with a 19mm~21mm lens
  20. Is this Haze, Condensation, or Coating damage?
  21. recommend me a nice slide projector
  22. Crop factor wins again
  23. Why The Plague of Longitudnal CA
  24. Contax G 35mm planar vs Hexar AF lens
  25. "Aperture chameleons"
  26. Rainbow Imaging "Wide Band Fader" adjustable ND filter
  27. Must have software for lens geeks
  28. shooting f4 with misalligned rf
  29. lens mount question
  30. Focus chart for rangefinder cameras (just print and test)
  31. fast flare free 35s
  32. How Many Photons in a Photograph
  33. There's something about the 50mm FOV...
  34. Why convertable lenses (frt interchang / bak fixed)
  35. Lens contrast: does is many any difference?
  36. W/NW 90 mm Minolta Rokkor-M
  37. bronica RF645 lenses not sharp! (diffraction test)
  38. CV 15mm vs. Velvia 50
  39. so I tried to set my RF according to the Nokton 35 and...
  40. HELP! Haze in lens, should I return? Pics inside
  41. M3 with delaminated finder experiment
  42. importance of a lens shade
  43. Filter Question- Yellow and Polarizer
  44. Need help! FotoDiox adapters
  45. What is up with this lens?
  46. Uncoated lenses
  47. It's not sharp...or is it?
  48. Bokeh and wide open performance of Heliars, Planars, Tessars, Triotars
  49. Lens with Perfect Circular Diaphragm stop down
  50. Steinheil-Munchen lenses = dating by serial # ?
  51. The highest quality for cost 50mm's
  52. what are various RF registers?
  53. X ray lenses those Exotic 0.75 and 0.95s KOWA etc
  54. measuring lines / mm at film
  55. aperture blades at 35 mm and MF lenses
  56. F3.5 100mm Canon Lens Formula
  57. Favorite 40?
  58. Should I send this Canon 50/1.8 back
  59. Perspective Distortion of Telephoto Lenses across Formats?
  60. LTM->m mount adapter question
  61. Correcting Distortion
  62. What kind of wide angle lens is resistant to flare?
  63. shaeper
  64. Replacing an Aspherical Element?
  65. Sold 2 lenses, bought 2 lenses
  66. Carl Zeiss Jena 8.5cm Triotar - but what does it fit?
  67. why are f-stops 2, 2.8, 4, 5.6, 8, 11?
  68. Why get such a fast 50mm? 50mm f1.2 vs f1.4
  69. what is the deal with chromatic aberration?
  70. What am I looking at? and how do I find more... (image intense)
  71. controlling perspective with a 28mm
  72. Help with my lens
  73. Can this be fixed (Reasonably) ?
  74. Separation or haze - that's the question
  75. Stuck adapter or M mount ?
  76. What cameras use Series Filters?
  77. LSM (M39) lens on Leica M6
  78. Bubbles or Leica Glow ?
  79. Long Lenses and DOF
  80. low contrast vs high contrast lenses on B&W film
  81. The year is 1954....
  82. diopter question
  83. Leica Lens Making Video
  84. Turret viewfinders
  85. Need Help/Feedback Please: Rear Element-Can this be cleaned up?
  86. 40mm and a 50mm?
  87. focus shift - please explain it
  88. Lens focussing errors
  89. Viewfinders of film P&S cameras: normal vs big
  90. This question pre-supposes the existence of "Leica Glow."
  91. What FL for RF vs. SLR
  92. Zeiss and Schneider designs, same?
  93. Useing my analog lens on my digicam?Is an f2 better than an f4?
  94. Budget Glass Hall of Fame
  95. Tiffen filter why uncoated, any advatage?
  96. Lens decementing and coating damage problem
  97. How is shutter speed defined really?
  98. dust
  99. Mind your Focus Shift...
  100. Hood and filter question
  101. Fixing that old glass
  102. What's your favourite lens on the Nex-5n?
  103. Loose retaining rings in B+W filters
  104. Beginner with Pentax Loupe question
  105. Is this real?
  106. 1:1 Macro Lens on APS-C Sensor
  107. Want to try filters - need a 'for dummies'
  108. Fast old wides for DSLR
  109. Industar-50, Collapsible vs Rigid depth
  110. ferider-adapted smc pentax-m 50/1.4 ...
  111. Review: ferider modified Pentax 50/1.4 in M-mount adapter
  112. developments in autofocus technology
  113. FSU LTM need adjustment for M mount?
  114. Filters
  115. How to Calculate Crop Factor, F-Stops, and Equivalent Lenses
  116. Avenon/Kobalux 21mm pouch?
  117. How far away is infinity? (optically speaking, of course)
  118. Some lenses tested on a Chinese website
  119. 'C' mount lenses
  120. Why is 24/25mm better than 28mm?
  121. Does your Summicron focus-shift?
  122. Flat lens offers distortion free images
  123. What did you do with your high end enlarging lenses?
  124. Fader ND filters
  125. How to figure out flange focal distance? [Focomat 2c]
  126. 15mm vs. 21mm
  127. What if
  128. fotodiox adaptors for EOS EF-M mount
  129. What's better than Autofocus and manual focus?
  130. Which 50mm!?!?!
  131. Do you mix and match your lens brands?
  132. Lens wisdom of the day (the century)
  133. Barry Lyndon Zeiss 0.7/50 write-up
  134. 50mm with character?
  135. why do elements seperate?
  136. why can't you evaluate flare and bokeh in the viewfinder?
  137. Helicoid 13-17mm to short.
  138. What to do with hazy lenses
  139. Lenses for Curved Screen Projection
  140. Does it make sense to replace single 35 with 28 + 50?
  141. ID this mount?
  142. Focus accuracy on film vs. digital
  143. focus shift basic question
  144. Best 21mm lens for infrared photography
  145. 'Front cell' vs 'unit' focussing
  146. Differences in lens characteristics and performance
  147. Elmar Vs. Tessar or why did the Tessar conquer the world?
  148. 40mm lenses: why are they so small?
  149. DIY 35mm lens test on Fuji, Summilux and Summicron
  150. A fuzzy question
  151. Cooke Triplet lens - any for M's
  152. Film lenses and mirrorless digital
  153. sonnars and focus shift
  154. Low Contrast Lens:High Contrast Scene?
  155. Fast Sonnar Clone Shootout - Canon, Jupiter, Nikkor
  156. Radioactive lenses and Geiger counter
  157. Tessar (type and triplet) front element focusing - focus shift
  158. Determining Lens Hood Dimensions
  159. The making of a custom lens mount
  160. how to check for vignetting (from hood/filters)
  161. Front cell focusing revisited
  162. Can I see "bad" bokeh...
  163. has anyone converted their Hexar AF lens to M-mount?
  164. Stepless aperture lenses
  165. Kubrick exhibition at LA County Museum
  166. Soft or Sharp
  167. What lens type causes the "circular" blur/bokeh?
  168. f/22 & f/32?
  169. What dipoter do I need?
  170. Do you try to match signatures with your lens kits?
  171. Crop question....
  172. uv/ir on film cameras?
  173. Petzval Lens
  174. Extending Eye Relief
  175. BBC: The Perfect Lens
  176. Make a correction table for your rangefinder.
  177. Impact of aperture on distortion. I don't get it!
  178. Agonizing about lenses: 4 friends in their 50s
  179. Lens Internal Crack (Delamination)
  180. 35/1.4 shootout - Nokton MC vs SC vs Summilux FLE vs Canon LTM
  181. Colour vs B&W: why is there any difference?
  182. DIY Lens Testing Help
  183. "Rendering" vs Sharpness
  184. Film and digital resolution compared
  185. Best 50mm for f8-f16
  186. About aperture and shutter.
  187. 21mm vs 25mm distortion on a 1.5 crop factor sensor
  188. Vignetting: Is it a dirty word?
  189. Help me with these Focus Tests
  190. Sony Lens Designer Discusses FE Design
  191. Backfocus - Is the solution Physics?
  192. Summicron 35mm v4 vs. Asph
  193. Sony Curved FF Sensor
  194. What is going on here? Chromatic Ab? Flare? (Tessar photo attached)
  195. "Who killed infinity focus"
  196. Why is f/2 dimmer than f/2.8 on a Zuiko lens?
  197. Does the glass matter?
  198. the right cement for doublets
  199. "Old" lenses difference for b/w film scans and prints.
  200. Is dust bad?
  201. Speaking about design, what does close to zero distortion imply?
  202. Rangefinder equivalent base length for critical focus
  203. How drastically protected are old lenses' designs?
  204. & normal Pentax K mount lenses compared for bokeh.
  205. Is there a filter that will "create" B+W images on color film?
  206. Is the Rokkor M 90 a scaled down Tele Elmarit?
  207. Bubbles in lens element
  208. Auxiliary Lenses for fixed lens cameras?
  209. Low frequency spatial resolution?
  210. Modern (flat) rendering vs. classic (full of character) rendering
  211. 35/1.4 shootout take II
  212. Thorium glass
  213. Fast Moderate Wides, Focus Shift and Pixel Peeping
  214. what does this mean to photography?
  215. Focussing with varifocal eye glasses
  216. 50mm / 40mm / 35mm close focus shoot out
  217. Reversed front element: what other mods to explore?
  218. Wratten Filter Question
  219. Lens variance
  220. Summicron 50/2 vs Nikkor 50/2 comparison
  221. FFD Question (Flange Focal Distance)
  222. Effects of repositioning rear lens element
  223. What do these numbers mean? Lens Resolving Power lp/mm
  224. 28mm Lens comparison: Sony vs. Leica vs/ Voigtlander
  225. Leaf shutter
  226. The lack of 3D information in modern corrected lenses?
  227. Lens contrast vs digital contrast
  228. Examples where great corner performance mattered
  229. Viewfinder magnification & FoV
  230. Reversed mounting a Zeiss Mikrotar 45/4.5 lens on Olympus EPL-2
  231. Where the Far Range Begins (In Focal Lengths)