an easier solution? at DVinfo.net

Arthur To · November 27th, 2004, 02:32 AM

hi, i saw a guy with a homemade mini35, and he put a canon SLR lens on it (a relatively in expensive one). he turned on the motor and it was AMAZING!.

but what if i bought that lens, and a canon XL1s EF adapter and put THAT on my XL...... would i get the same effect? why or why not?-- assuming i'd also get a wide angle lens to kill that disgusting 7.2x magnification. would i be looking at the same DEPTH OF FIELD?

thx
-arthur

Elmar Tewes · November 27th, 2004, 09:05 AM

you cant kill that 7.2x magnification by using a wide angle lense. the focal length is still 7.2x, just the new focal length will be lower cause you used a lense with a low focal length (100mm - 720mm, 15mm - 108mm).
but that construction doesn't change the depth of field. that home made mini35 uses a special construction to imitate the mini35, but its still a optical system (with old photo cameras or rotating fake cd's ect), the ef adapter is a mechanical adapter. i suppose it was invented to use the xl-1 for filming wildlife or reasons where a extreme high focal length is needed

Cosmin Rotaru · November 30th, 2004, 07:10 AM

DOF depends on focal lens. The loger the focal lens, the shorter the DOF.
So, using a very wide lens (to "kill" the 7.2X magnification) means you get a very long DOF. Actualy, the lens you're already using on your XL1S is a very wide lens. 7.2X wider then a "normal" (like the canon SLR you talked about) lens. That's why you get that long DOF.

November 27th, 2004, 02:32 AM	#1
Arthur To Regular Crew Join Date: Nov 2003 Location: Cerritos, CA Posts: 78	an easier solution? hi, i saw a guy with a homemade mini35, and he put a canon SLR lens on it (a relatively in expensive one). he turned on the motor and it was AMAZING!. but what if i bought that lens, and a canon XL1s EF adapter and put THAT on my XL...... would i get the same effect? why or why not?-- assuming i'd also get a wide angle lens to kill that disgusting 7.2x magnification. would i be looking at the same DEPTH OF FIELD? thx -arthur __________________ xL1s

November 30th, 2004, 07:10 AM	#3
Cosmin Rotaru Major Player Join Date: Feb 2003 Location: Romania, Timisoara Posts: 453	DOF depends on focal lens. The loger the focal lens, the shorter the DOF. So, using a very wide lens (to "kill" the 7.2X magnification) means you get a very long DOF. Actualy, the lens you're already using on your XL1S is a very wide lens. 7.2X wider then a "normal" (like the canon SLR you talked about) lens. That's why you get that long DOF. __________________ Cosmin Rotaru

November 27th, 2004, 09:05 AM	#2
Elmar Tewes Regular Crew Join Date: Oct 2001 Location: Frankfurt Germany Posts: 104	you cant kill that 7.2x magnification by using a wide angle lense. the focal length is still 7.2x, just the new focal length will be lower cause you used a lense with a low focal length (100mm - 720mm, 15mm - 108mm). but that construction doesn't change the depth of field. that home made mini35 uses a special construction to imitate the mini35, but its still a optical system (with old photo cameras or rotating fake cd's ect), the ef adapter is a mechanical adapter. i suppose it was invented to use the xl-1 for filming wildlife or reasons where a extreme high focal length is needed