ali@polya.STANFORD.EDU (Ali Ozer) (03/02/88)
--------------- Hello, world! Here's a question for you people with DigiView... I want to get a lens that'll allow me to digitize smaller images than I currently can --- With the WV1410 and the vanilla lens that came with it, 3x5" seems to be the lowest limit when digitizing. It'd be nice to have a lens that will let me digitize (to full screen size) things that are maybe 1 inch wide. Is this possible, and if so, with what lens? And where can I get it? And how megawatts of light will I need? (megalux? whatever light is measured in...) Ali Ozer, ali@polya.stanford.edu
kim@amdahl.uts.amdahl.com (Kim DeVaughn) (03/03/88)
Note the followup line. I presume this would be an appropriate item for the new group. In article <2097@polya.STANFORD.EDU>, ali@polya.STANFORD.EDU (Ali Ozer) writes: > --------------- > Hello, world! Here's a question for you people with DigiView... I want > to get a lens that'll allow me to digitize smaller images than I currently > can --- With the WV1410 and the vanilla lens that came with it, 3x5" seems to > be the lowest limit when digitizing. It'd be nice to have a lens that will > let me digitize (to full screen size) things that are maybe 1 inch wide. > Is this possible, and if so, with what lens? And where can I get it? > And how megawatts of light will I need? (megalux? whatever light is measured > in...) I picked up a nice Vivitar f2.8 55mm Macro lens at a large camera store in Palo Alto last year. It works very well, and I can get good full screen images from an original area the size of a thumb-nail. About $125, as I recall. Of course the quality of the image is highly dependent on the resolution of the original, but I've had acceptable results from sources like the slick pages in TV-Guide, etc.) In addition to the lens itself, you'll need to get a "C-type" adaptor, to mate the lens to the small threaded aperture of the camera. $30. And figure out a way to support the Digi-View color filter wheel (if the individual segments are large enough to cover the new lens). Or you can pick up some red, green, and blue gel filters that fit on the Macro lens. $15 ea. (Can also have fun, and create some interesting color effects with other filters, polorizers, etc.) I'm quite pleased with this setup, though a lens that can zoom between macro usage and normal usage would be very handy. But those cost some really significant bucks ($400+). And, given the attainable quality, resolution, etc. of the results, would be a waste of money. I'd recommend a tour of the camera shop to see what's available, and then hit the pawn shops, Potpourri, and so forth. Or maybe the back-page mail-order outfits in Photography Today, or whatever. As for lights ... I've been using the same pair of 100w. bulbs that I use with the normal lens (though you can play with lighting quit a bit for effects, improved quality, etc.) [ Isn't "quantity of light" measured in lumens, and "intensity" in foot-candles, or some such? ] One other thing ... for best results, don't forget the "mechanical focus" adjustment on the back end of the camera. It can help getting those close closeup's too. /kim -- UUCP: kim@amdahl.amdahl.com or: {sun,decwrl,hplabs,pyramid,ihnp4,uunet,oliveb,cbosgd,ames}!amdahl!kim DDD: 408-746-8462 USPS: Amdahl Corp. M/S 249, 1250 E. Arques Av, Sunnyvale, CA 94086 CIS: 76535,25
sterling@cbmvax.UUCP (Rick Sterling QA) (03/04/88)
In article <2097@polya.STANFORD.EDU> ali@polya.STANFORD.EDU (Ali Ozer) writes: > --------------- > Hello, world! Here's a question for you people with DigiView... I want > to get a lens that'll allow me to digitize smaller images than I currently > can --- With the WV1410 and the vanilla lens that came with it, 3x5" seems to > be the lowest limit when digitizing. It'd be nice to have a lens that will > let me digitize (to full screen size) things that are maybe 1 inch wide. > Is this possible, and if so, with what lens? And where can I get it? > And how megawatts of light will I need? (megalux? whatever light is measured > in...) > > Ali Ozer, ali@polya.stanford.edu There is a mechanical focus adjustment on the back panel of the WV1410 that will allow you to get a close focus with your existing lens. Not as good as a true macro lens but fairly effective. I have digitized 35mm slides and 35mm B/W negatives this way. It helps to have an adjustable f-stop so you can stop down to increase your depth-of-field.