September 01, 2014, 05:12:51 AM

Author Topic: Canon 70D Auto ISO Increments  (Read 1592 times)

Sameer Thawani

  • Power Shot G16
  • **
  • Posts: 23
    • View Profile
Canon 70D Auto ISO Increments
« on: September 26, 2013, 12:16:37 PM »
I just read a comment on a forum saying that the Canon 70D, when set to Auto ISO only chooses ISO's in one stop increments. So for e.g. if ISO 800 is not enough, it will jump to ISO 1600, and will not select ISO 1000 or ISO 1250 in AUTO ISO. Similarly if ISO 3200 is not enough, it will jump to ISO 6400 and will not use ISO 4000/5000. (Assuming you have set max ISO to 6400).

I would think that by setting ISO increments to 1/3 stops (C. Fn I-2, page 365 of 70d user manual) ISO will increase in 1/3 stops, even in AUTO ISO. Can 70D owners kindly confirm this for me ? I don't have one, but am considering buying one and AUTO ISO is a part of my shooting style.

And yes - I know if I have a problem with higher ISO's I can use Manual ISO and all that - as I mentioned, it's a part of my shooting style and I want to keep it that way.

Thanks.

canon rumors FORUM

Canon 70D Auto ISO Increments
« on: September 26, 2013, 12:16:37 PM »

neacail

  • SX50 HS
  • **
  • Posts: 1
    • View Profile
Re: Canon 70D Auto ISO Increments
« Reply #1 on: October 20, 2013, 07:38:34 PM »
Yes. When C.Fn I 2 is set to 1/3 the auto ISO will change by 1/3 instead of full stops. I regularly shoot junior hockey using auto iso on my 70D.

dilbert

  • Canon EF 300mm f/2.8L IS II
  • *******
  • Posts: 2824
    • View Profile
Re: Canon 70D Auto ISO Increments
« Reply #2 on: October 20, 2013, 08:45:48 PM »
The reason for this is that the 1/3 increments are not hardware based but software emulation of that ISO number.

canon rumors FORUM

Re: Canon 70D Auto ISO Increments
« Reply #2 on: October 20, 2013, 08:45:48 PM »