Hi Rob, What is an FL range?
The term "digital lens" is rather a bit of a misnomer in my opinion. A lens is a lens is a lens. What counts is whether the chosen lens is suitable for the application. One other thing I'm thinking... since were talking (somewhat) about the use of existing lenses on as yet non-existent digital camera bodies... If any lens of sufficient quality attached to the camera body achieves a critical focus on the focal plane, and the image transmitted to the focal plane covers the entire sensor area, be it CCD or film, that's all that matters. When I say "all the matters", I mean it in the context of the image reaching the focal plane properly, in focus, distortion free. The flip-side view is, if we were able to remove the film from the focal plane and place an equal sized CCD at the focal plane, that has no bearing on the image reaching the focal plane. The same image is reaching the focal plane. Lens aside, the main determining factor on image quality, at that point, is what is lying in the focal plane and it's ability to render the image. Tom C. ----- Original Message ----- From: "Rob Studdert" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, October 28, 2001 3:57 PM Subject: Re: 'analogical' lenses coating and CCD, not fully compatible? > On 28 Oct 2001, at 9:11, Jaume Lahuerta wrote: > > > What do you think? Have you heard about this before? > > Sure have, just about the time when the first CD audio players came on the > market some audio components were deemed digital ready :-) I would like to > see some technical side to the argument given that lens coatings are there > not for the sake of matching a lens to any film but singularly to reduce > unwanted reflections. Digital lenses as far as I can determine have there > image forming cone optimised to cover a smaller area and often offer FL > ranges not covered by regular 35mm lenses. They may also be designed to > have a longer effective secondary principal plane in order to reduce the angle > of incidence on the sensor? > > Cheers, > > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://www.ozemail.com.au/~distudio/publications.html > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
