Is T3.5 different from F3.5? Should i expect translations in DOF? at DVinfo.net

Go Back   DV Info Net > Special Interest Areas > Alternative Imaging Methods

Alternative Imaging Methods
DV Info Net is the birthplace of all 35mm adapters.


Reply
 
Thread Tools Search this Thread
Old February 14th, 2010, 02:05 AM   #1
Regular Crew
 
Join Date: Mar 2005
Posts: 113
Is T3.5 different from F3.5? Should i expect translations in DOF?

Hey, what's up guys?
being off the field for a while.

Need some help here.
thank you very much in advance.


I want to know if there's any difference between let's say: T2.8 and F2.8
I notice the aperture in some lenses, such as the panavisions, comes expressed with a "T"

Is one or the other getting more light to the sensor,
so the DOF is different from one each other?
Roberto Lanczos is offline   Reply With Quote
Old February 14th, 2010, 02:23 AM   #2
Inner Circle
 
Join Date: Nov 2006
Location: Tallahassee, FL
Posts: 4,100
*T* stops take the loss of light through the lens into account. F Stops are mathematical formulas that give an ideal best case. In other words, F Stop pretends there is no light loss through the glass, whereas T-Stops take the loss of the glass into account.
__________________
DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.
Perrone Ford is offline   Reply With Quote
Old February 14th, 2010, 02:27 AM   #3
Regular Crew
 
Join Date: Mar 2005
Posts: 113
Is there a chart with equivalents of T-Stops to F-Stops ?
Roberto Lanczos is offline   Reply With Quote
Old February 14th, 2010, 03:29 AM   #4
Wrangler
 
Join Date: Jan 2002
Location: Los Angeles, CA
Posts: 6,781
no, the whole point is that t-stops are calibrated to a given lens, where f-stops are, as Perrone says, simply mathematical and thus have more margin for error.

Just use the t-stops as you used to use f-stops and you will be fine.
__________________
Charles Papert
www.charlespapert.com
Charles Papert 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 > Special Interest Areas > Alternative Imaging Methods

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 05:01 PM.


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