If your crops were of the same dimension in pixels and the framing on the bird was the same, the K20D and 300 would yield a slightly larger print. Paul On Jun 27, 2008, at 9:15 AM, John Wittingham wrote:
> Thanks for the responses, OK I think I need to re-word this > altogether, Pentax K10D 10.2 Megapixels fitted with 400mm lens v's > Pentax K20D 14.6 Megapixels fitted with 300mm lens, assuming both > lenses produce excellent results, which combination would give the > bigger print size from a crop at the center of the frame if yoy > were for example shooting a distant bird at the same distance in > each case? > > Regards, > > John > ________________________________________ > From: [EMAIL PROTECTED] [EMAIL PROTECTED] On Behalf Of J. > C. O'Connell [EMAIL PROTECTED] > Sent: 27 June 2008 13:18 > To: 'Pentax-Discuss Mail List' > Subject: RE: Sensor resolution V focal length.......... > > Are you trying to say that there will be no resolution loss in > using a K20D > with a shorter lens vs a K10D with a longer lens if the AOV of the > image > is kept the same via cropping the K20D image? The REAL sensor size > of the 2 > cameras > are NOT EQUIVALENT if you crop the K20D image and use a shorter fl > lens. > > JC OCONNELL > [EMAIL PROTECTED] > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of > Anthony Farr > Sent: Friday, June 27, 2008 8:03 AM > To: 'Pentax-Discuss Mail List' > Subject: RE: Sensor resolution V focal length.......... > > > The crop will be the same from K10d to K20d, because the crop > factor is > related to the sensor dimension not its resolution, and the two > cameras have > equivalent sensor dimensions. > > The K20D shots will "enlarge" more at 100% view, simply because it > has a > greater pixel density. This doesn't mean anything other than that > your > monitor resolution (e.g. 1024 x 768)represents a smaller patch of > the K20ds > sensor compared to the K10d. The >>whole<< picture will have the > same field > of view for the same lens when the two camera models are compared. > You > wouldn't print at 100%, the only practical use for this view is when > performing some editing functions, and for pixel peeping. > > Regards, > Anthony Farr > >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >> Of John Wittingham >> Sent: Friday, 27 June 2008 8:59 PM >> To: [email protected] >> Subject: Sensor resolution V focal length.......... >> >> I'm in need of some longer glass, longer than 300mm. It occured to me >> the > other >> day that the crop of a given area of a frame would be consirerably >> bigger > the more >> resolution you have from the sensor of the camera viewed at 100%. So >> I'm > thinking >> 400mm on the K10D would be approximately 33% bigger at the same crop >> as it would be from 300mm viewed at 100% right? >> >> So if I'm using a K20D how much bigger would a crop of the same >> subject > shot with >> the K10D be viewed at 100%, could I substitute pixels for focal >> length > providing the >> lens resolution is up to the job? Are there any downsides other than >> the > obvious >> differences when using a shorter focal length such as DoF? >> >> Regards, >> >> John >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above >> and > follow >> the directions. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
