RE: OT: Teleconverter Calculation
Hi Dan, Yes, it makes. That is the kind of approximation I need. Thanks, Dave > -----Original Message----- > From: Dan Burkholder [mailto:fdanb@aol.com] > Sent: Tuesday, February 27, 2007 2:07 PM > To: alt-photo-process-l@usask.ca > Subject: Re: OT: Teleconverter Calculation > > Hey Dave, > > The trick I use when trying to visualize what a longer lens > will do is as follows: > > Mentally divide your viewfinder into quarters with a vertical > and horizontal line running through the middle of the frame. > If you are shooting with a 50mm lens (for example), going to > a 100mm lens will fill the frame with what you are seeing in > one of those quarters. That would be a 2x magnification. And > of course, if you subdivide one of of those quarters into > four smaller quarters, going to a 200mm lens would fill one > of those tiny areas. > > If your teleconverter is a 1.75x version, you'd "magnify" a > bit less than the 2x example above. Make sense? > > Hope this helps and enjoy the new gizmo, > > Dan > > Dave Soemarko wrote on 2/27/07, 9:23 AM: > > > Hi, I am interested in getting a teleconverter lens for my > digital > camera. > > The spec. for the lens says that it " > > converts the focal length by a factor of 1.75." Before > getting the > lens, I > would like to get an idea how much > "closer" I will be able to get to the > object. Does anyone > know how I can calculate that? > > > > > > Thanks, > > Dave > > > > > > > > > > -- > www.DanBurkholder.com > www.TinyTutorials.com > > >
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