Teleconverters


Status
Not open for further replies.

Drudkh

Senior Member
Mar 2, 2004
6,129
0
0
lulu island
#1
When using TC, lets say a 2.0X, the f-stop will increase right? But, by how much?

Example: 2.0X TC + lens with f5.6
What is the largest aperture I can get? I heard people saying increase 2 stops but what will it be?

I don't own a TC, so need you guys to contribute.

Thanks.
:)
 

jonoq

New Member
Sep 27, 2004
213
0
0
#3
Drudkh said:
When using TC, lets say a 2.0X, the f-stop will increase right? But, by how much?

Example: 2.0X TC + lens with f5.6
What is the largest aperture I can get? I heard people saying increase 2 stops but what will it be?

I don't own a TC, so need you guys to contribute.

Thanks.
:)
Just brought 1..mine will cause my len to increase 2 stop.
 

user111

Senior Member
Jul 27, 2004
4,702
0
36
#4
Drudkh said:
When using TC, lets say a 2.0X, the f-stop will increase right? But, by how much?
the maximum aperture will be decreased by effectively 2 stops
pls do not use the word "increase" because even though the marked value of the maximum aperture is numerically increased, the fact is that it is decreased

Drudkh said:
Example: 2.0X TC + lens with f5.6
What is the largest aperture I can get? I heard people saying increase 2 stops but what will it be?
if the lens starts off with maximum aperture of f5.6, then adding a 2x tc to it will decrease the maximum aperture to f11. however do note that from 5.6 to 11, it is a numerical increase
 

Drudkh

Senior Member
Mar 2, 2004
6,129
0
0
lulu island
#5
ok, lets not use increase or decrease,
lets say the lens is f6 and using 2.0X TC, the largest aperture will be f12?
so that means 1 f-stop is refered to the lens largest aperture, be it f5.6 or f8. but once used with a 2.0X TC, 2 f-stops, it becomes f11 and f16?

Am I right?
 

2100

Senior Member
Mar 3, 2004
3,591
0
0
48
#6
Drudkh said:
so that means 1 f-stop is refered to the lens largest aperture, be it f5.6 or f8. but once used with a 2.0X TC, 2 f-stops, it becomes f11 and f16?

Am I right?
Yeah correct, sort of.

You are using Minolta system right?
 

Drudkh

Senior Member
Mar 2, 2004
6,129
0
0
lulu island
#7
2100 said:
Yeah correct, sort of.

You are using Minolta system right?
yup. thank you all for the input, finally i have confirmed the theory.
:thumbsup:
 

Status
Not open for further replies.
Top Bottom