The way I analyze it, my conclusion is as follows: Its all about angles ---
If you use the same focal length in mm lens, the image will show more blur relatively speaking with the current DSLRS because you are only using a smaller portion of the image circle and magnifying it more than with with FF. If you use same AOV focal length with the DSLRS then the blur is relatively the same as it would be with the longer lens on FF. To sum it up, if you use the old 1/focal length rule as your minimum speed for FF, then you would need to use a new 1/(focal length * 1.5) for the smaller than FF sensored current Pentax DSLR bodies. i.e you need a faster shutter speed with these DSLR to compensate for the narrower AOV/higher magnification. jco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roman Sent: Wednesday, November 29, 2006 3:34 AM To: [email protected] Subject: re: Reciprocal of the Focal Length with DSLR http://roman.blakout.net/?blog=20060510145807 ^^^ This one here is 1/80 at 270mm, but admit, a lucky occasion. 200mm is still 200mm, it's only a cropped sensor that make FOV narrower than 35mm full-frame. That's the way I see, and with good grip and steady hand you can try shooting 1/300 at 200mm, but I try double focal length for sure shots, e.g. 1/500 for 200mm or so... Roman. was: Joseph Tainter <[EMAIL PROTECTED]> Subject: Reciprocal of the Focal Length with DSLR Considering the crop/magnification factor of the Pentax DSLR's, a 200mm lens = a 300mm lens (Let's not get into the argument about this, please). So, would one ideally shoot at 1/300 second hand held? -- new photos ever so often... <http://roman.blakout.net/> -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
