"clean" isos and focal length applications - Page 4 at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon EOS Full Frame for HD

Canon EOS Full Frame for HD
All about using the Canon 1D X, 6D, 5D Mk. IV / Mk. III / Mk. II D-SLR for 4K and HD video recording.


Reply
 
Thread Tools Search this Thread
Old September 14th, 2010, 02:05 PM   #46
Trustee
 
Join Date: Apr 2006
Location: United States
Posts: 1,158
Quote:
Originally Posted by Daniel Browning View Post
70-200 f/2.8 L IS (Mark I for $1900) @ f/4 vs 70-200 f/4 L IS ($1200) at f/4 - the slow lens is slightly sharper and much cheaper.

70-200 f/2.8 L ($1300) @ f/4 vs 70-200 f/4 L ($700) @ f/4 - the slow lens is softer but much cheaper.

24mm f/1.4 L Mark I ($1200 used?) @ f/2.8 vs 24mm f/2.8 ($300) @ f/2.8 - the slow lens is a little sharper and much cheaper.
let me add into the mix the Tamron 70-200 2.8. optically better then the original canon 70-200 2.8, and close enough with the V 2 of the canon that you couldn't tell them apart optically looking at images.

Tamron 70-200 2.8 vs Canon 70-200 2.8

and its a $700 lens, or 1/3 the price of the canon V2 which is something like $2300 or so ?. its internal zoom & focus as well, and I love shooting with this lens. However, I don't think price has really been much of a consideration here, unless maybe we were talking megabuck glass.

Quote:
Originally Posted by Daniel Browning View Post
Let me illustrate it. f/10 on a 10mm optic is a very small aperture stop (1mm in diameter), while f/10 on a 2500mm optic like my telescope is much larger (250mm). The 10mm weighs 1 pound and the 2500mm weighs 50 pounds. But when they're both used on the same camera, the diffraction in image space (what photographers care about) is the exact same, because the f-number is the same.
well the question is : is diffraction in a lens a function of the iris size ratio in relation to the overall size of the lens, or is it a function of the physical size of the light wavelengths passing thru the hole of an absolute size, like how a diffraction grating works.
__________________
Steve Oakley DP Audio Mixer Editor Colorist
http://stevenoakley.com
Steve Oakley is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon EOS Full Frame for HD

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 07:26 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network