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  1. 21mm lenses
  2. Close up lenses and MFD
  3. When you think 1:1 is fast....
  4. classic optical formula
  5. Cine Lenses - Cooke, Zeiss etc
  6. Acmaxx Lens Armor?
  7. Summitar and Thorium versa Uranium Prints
  8. Super Fast Super Wide is not for rangefinders?
  9. Filters on Single coated lenses
  10. retrofocus lenses and RFs...
  11. Rodenstock vs Schneider vs Pentax Loupes
  12. Lens condition
  13. Lens Coatings and Colour Response
  14. Is this flare?
  15. Does anyone still use shift lenses?
  16. Why use a fast 50mm?
  17. which 21mm cv viewfinder for accuracy?
  18. Post your images taken with a 19mm~21mm lens
  19. Is this Haze, Condensation, or Coating damage?
  20. recommend me a nice slide projector
  21. Crop factor wins again
  22. Why The Plague of Longitudnal CA
  23. Contax G 35mm planar vs Hexar AF lens
  24. "Aperture chameleons"
  25. Rainbow Imaging "Wide Band Fader" adjustable ND filter
  26. Must have software for lens geeks
  27. shooting f4 with misalligned rf
  28. lens mount question
  29. Focus chart for rangefinder cameras (just print and test)
  30. fast flare free 35s
  31. How Many Photons in a Photograph
  32. There's something about the 50mm FOV...
  33. Why convertable lenses (frt interchang / bak fixed)
  34. Lens contrast: does is many any difference?
  35. W/NW 90 mm Minolta Rokkor-M
  36. bronica RF645 lenses not sharp! (diffraction test)
  37. CV 15mm vs. Velvia 50
  38. so I tried to set my RF according to the Nokton 35 and...
  39. HELP! Haze in lens, should I return? Pics inside
  40. M3 with delaminated finder experiment
  41. importance of a lens shade
  42. Filter Question- Yellow and Polarizer
  43. Need help! FotoDiox adapters
  44. What is up with this lens?
  45. Uncoated lenses
  46. It's not sharp...or is it?
  47. Bokeh and wide open performance of Heliars, Planars, Tessars, Triotars
  48. Lens with Perfect Circular Diaphragm stop down
  49. Steinheil-Munchen lenses = dating by serial # ?
  50. The highest quality for cost 50mm's
  51. what are various RF registers?
  52. X ray lenses those Exotic 0.75 and 0.95s KOWA etc
  53. measuring lines / mm at film
  54. aperture blades at 35 mm and MF lenses
  55. F3.5 100mm Canon Lens Formula
  56. Favorite 40?
  57. Should I send this Canon 50/1.8 back
  58. Perspective Distortion of Telephoto Lenses across Formats?
  59. LTM->m mount adapter question
  60. Correcting Distortion
  61. What kind of wide angle lens is resistant to flare?
  62. shaeper
  63. Replacing an Aspherical Element?
  64. Sold 2 lenses, bought 2 lenses
  65. Carl Zeiss Jena 8.5cm Triotar - but what does it fit?
  66. why are f-stops 2, 2.8, 4, 5.6, 8, 11?
  67. Why get such a fast 50mm? 50mm f1.2 vs f1.4
  68. what is the deal with chromatic aberration?
  69. What am I looking at? and how do I find more... (image intense)
  70. controlling perspective with a 28mm
  71. Help with my lens
  72. Can this be fixed (Reasonably) ?
  73. Separation or haze - that's the question
  74. Stuck adapter or M mount ?
  75. What cameras use Series Filters?
  76. LSM (M39) lens on Leica M6
  77. Bubbles or Leica Glow ?
  78. Long Lenses and DOF
  79. low contrast vs high contrast lenses on B&W film
  80. The year is 1954....
  81. diopter question
  82. Leica Lens Making Video
  83. Turret viewfinders
  84. Need Help/Feedback Please: Rear Element-Can this be cleaned up?
  85. 40mm and a 50mm?
  86. focus shift - please explain it
  87. Lens focussing errors
  88. Viewfinders of film P&S cameras: normal vs big
  89. This question pre-supposes the existence of "Leica Glow."
  90. What FL for RF vs. SLR
  91. Zeiss and Schneider designs, same?
  92. Useing my analog lens on my digicam?Is an f2 better than an f4?
  93. Budget Glass Hall of Fame
  94. Tiffen filter why uncoated, any advatage?
  95. Lens decementing and coating damage problem
  96. How is shutter speed defined really?
  97. dust
  98. Mind your Focus Shift...
  99. Hood and filter question
  100. Fixing that old glass
  101. What's your favourite lens on the Nex-5n?
  102. Loose retaining rings in B+W filters
  103. Beginner with Pentax Loupe question
  104. Is this real?
  105. 1:1 Macro Lens on APS-C Sensor
  106. Want to try filters - need a 'for dummies'
  107. Fast old wides for DSLR
  108. Industar-50, Collapsible vs Rigid depth
  109. ferider-adapted smc pentax-m 50/1.4 ...
  110. Review: ferider modified Pentax 50/1.4 in M-mount adapter
  111. developments in autofocus technology
  112. FSU LTM need adjustment for M mount?
  113. Filters
  114. How to Calculate Crop Factor, F-Stops, and Equivalent Lenses
  115. Avenon/Kobalux 21mm pouch?
  116. How far away is infinity? (optically speaking, of course)
  117. Some lenses tested on a Chinese website
  118. 'C' mount lenses
  119. Why is 24/25mm better than 28mm?
  120. Does your Summicron focus-shift?
  121. Flat lens offers distortion free images
  122. What did you do with your high end enlarging lenses?
  123. Fader ND filters
  124. How to figure out flange focal distance? [Focomat 2c]
  125. 15mm vs. 21mm
  126. What if
  127. fotodiox adaptors for EOS EF-M mount
  128. What's better than Autofocus and manual focus?
  129. Which 50mm!?!?!
  130. Do you mix and match your lens brands?
  131. Lens wisdom of the day (the century)
  132. Barry Lyndon Zeiss 0.7/50 write-up
  133. 50mm with character?
  134. why do elements seperate?
  135. why can't you evaluate flare and bokeh in the viewfinder?
  136. Helicoid 13-17mm to short.
  137. What to do with hazy lenses
  138. Lenses for Curved Screen Projection
  139. Does it make sense to replace single 35 with 28 + 50?
  140. ID this mount?
  141. Focus accuracy on film vs. digital
  142. focus shift basic question
  143. Best 21mm lens for infrared photography
  144. 'Front cell' vs 'unit' focussing
  145. Differences in lens characteristics and performance
  146. Elmar Vs. Tessar or why did the Tessar conquer the world?
  147. 40mm lenses: why are they so small?
  148. DIY 35mm lens test on Fuji, Summilux and Summicron
  149. A fuzzy question
  150. Cooke Triplet lens - any for M's
  151. Film lenses and mirrorless digital
  152. sonnars and focus shift
  153. Low Contrast Lens:High Contrast Scene?
  154. Fast Sonnar Clone Shootout - Canon, Jupiter, Nikkor
  155. Radioactive lenses and Geiger counter
  156. Tessar (type and triplet) front element focusing - focus shift
  157. Determining Lens Hood Dimensions
  158. The making of a custom lens mount
  159. how to check for vignetting (from hood/filters)
  160. Front cell focusing revisited
  161. Can I see "bad" bokeh...
  162. has anyone converted their Hexar AF lens to M-mount?
  163. Stepless aperture lenses
  164. Kubrick exhibition at LA County Museum
  165. Soft or Sharp
  166. What lens type causes the "circular" blur/bokeh?
  167. f/22 & f/32?
  168. What dipoter do I need?
  169. Do you try to match signatures with your lens kits?
  170. Crop question....
  171. uv/ir on film cameras?
  172. Petzval Lens
  173. Extending Eye Relief
  174. BBC: The Perfect Lens
  175. Make a correction table for your rangefinder.
  176. Impact of aperture on distortion. I don't get it!
  177. Agonizing about lenses: 4 friends in their 50s
  178. Lens Internal Crack (Delamination)
  179. 35/1.4 shootout - Nokton MC vs SC vs Summilux FLE vs Canon LTM
  180. Colour vs B&W: why is there any difference?
  181. DIY Lens Testing Help
  182. "Rendering" vs Sharpness
  183. Film and digital resolution compared
  184. Best 50mm for f8-f16
  185. About aperture and shutter.
  186. 21mm vs 25mm distortion on a 1.5 crop factor sensor
  187. Vignetting: Is it a dirty word?
  188. Help me with these Focus Tests
  189. Sony Lens Designer Discusses FE Design
  190. Backfocus - Is the solution Physics?
  191. Summicron 35mm v4 vs. Asph
  192. Sony Curved FF Sensor
  193. What is going on here? Chromatic Ab? Flare? (Tessar photo attached)
  194. "Who killed infinity focus"
  195. Why is f/2 dimmer than f/2.8 on a Zuiko lens?
  196. Does the glass matter?
  197. the right cement for doublets
  198. "Old" lenses difference for b/w film scans and prints.
  199. Is dust bad?
  200. Speaking about design, what does close to zero distortion imply?
  201. Rangefinder equivalent base length for critical focus
  202. How drastically protected are old lenses' designs?
  203. & normal Pentax K mount lenses compared for bokeh.
  204. Is there a filter that will "create" B+W images on color film?
  205. Is the Rokkor M 90 a scaled down Tele Elmarit?
  206. Bubbles in lens element
  207. Auxiliary Lenses for fixed lens cameras?
  208. Low frequency spatial resolution?
  209. Modern (flat) rendering vs. classic (full of character) rendering
  210. 35/1.4 shootout take II
  211. Thorium glass
  212. Fast Moderate Wides, Focus Shift and Pixel Peeping
  213. what does this mean to photography?
  214. Focussing with varifocal eye glasses
  215. 50mm / 40mm / 35mm close focus shoot out
  216. Reversed front element: what other mods to explore?
  217. Wratten Filter Question
  218. Lens variance
  219. Summicron 50/2 vs Nikkor 50/2 comparison
  220. What do these numbers mean? Lens Resolving Power lp/mm
  221. 28mm Lens comparison: Sony vs. Leica vs/ Voigtlander
  222. Leaf shutter
  223. The lack of 3D information in modern corrected lenses?
  224. Lens contrast vs digital contrast
  225. Examples where great corner performance mattered
  226. Viewfinder magnification & FoV
  227. Reversed mounting a Zeiss Mikrotar 45/4.5 lens on Olympus EPL-2
  228. Where the Far Range Begins (In Focal Lengths)
  229. Radioactive lens: do you know?
  230. Sonnar 50mm test (any ?)
  231. Modern vs 'legacy' macro lenses on m4/3
  232. Nikon 28 CRC
  233. Standard books on optics concerning photography
  234. This is news: A P&S Noctilux !
  235. T-Mount to MA ???
  236. Don't judge a lens by the scratches
  237. Metalenses at visible wavelengths: development of flat lenses
  238. The 'flattening of modern lenses'
  239. A Short History of Fast Normal Lenses
  240. Removing fungus from a Rokkor-m 40mm
  241. comparison of 32 'normal' lenses
  242. "The ins and outs of focus" by Harold M. Merklinger
  243. Adapters Having an Aperture *IRIS*
  244. 7 35mm lenses compared
  245. DOF on digital cameras
  246. Neat, short video: How Lenses Function
  247. Three-element lens designs by Zeiss