Using slower zooms on 1N (17-40L/70-200f4)

[dermot_conlan4]

Anyone using these newer but slower zoom lenses

17-40L / 70-200 f4L on older Canon 1n body? If so any thoughs

about how the five sensors handle AF, do you find it frustratingly

slow are you missing shots etc. do you find yourself using faster

primes? An input appreciated, thanks in advance.

[john_tobias1]

1n and 70-200 f4 L ..............never had a problem, even when using the 1.4X teleconverter (though it is mostly bright outside work.

 

I also have a 200 f2.8L and it is arguably a teeny weeny bit faster to lock focus but not enough that I would shell out the 3X cost for the 70-200 2.8L over the f4

 

1n is still a pretty hot performer.

[jean_berthe]

What a strange question� You must know that the EOS1n �high performance center cross AF sensor� reverts to a �average vertical sensor� when NOT using lenses with f2.8 for faster?

 

I know that I need �horizontal contrast� features when I use a f3.5-4.5 zoom with my EOS3 to track a moving target (slow or fast). I don�t need that �horizontal contrast� feature when I use the same lens on my ElanII. I could NOT track such movements with the EOS3/100-300 f5.6L lens but I had no problems tracking similar moving target with the ElanII/100-300 f5.6L!

 

I do not have the EOS1n, 17-40 f4L but I traded my 100-300 f5.6L for a 70-200 f2.8L (+1.4xTC). What I could NOT track with the EOS3 but could track with the ELANII is no problems now with both cameras.

 

Sometime I use my wife�s 70-200 f4L with my EOS3 and it will track people or objects quite beautifully, because the �high performance center cross AF sensor� of the EOS3 is good until f4.

 

Good luck

[jean_berthe]

Me again�

 

My comments above are in a AI-SERVO AF context, with moving target. If you are talking about ONE-SHOT AF, I did notice some little �snap into focus� difference while using 3.5-4.5 zooms compared to fast 2.8 lenses. I definitely noticed more focus hunting using EOS3/100-300 f5.6L but no focus hunting with the ElanII/100-300 f5.6L. I loved that lens but I wanted to work with the EOS3, so� bye-bye 5.6L, hello 2.8L. I also traded my old trusty 28-70 f3.5-4.5II for a 28 f2.8, 35 f2, 50 f1.8 and I am looking for a 85 f1.8. (traded slightly slow focus for very slow lens swaping�).

 

Good luck

[dermot_conlan4]

Not such a strange question...read you answer you are having

differing results with your wifes Elan and your 3, we are talking

about a 10 year old body with 5 sensors as opposed to one with

45. Thanks for your response.

[PuppyDigs]

I used to own an EOS 1N and it's a wonderful tool with fast glass. e.g., F2.8 or faster. Unfortunately, the cross AF sensor reverts to a simple vertical sensor with slower glass and is fairly useless. The AF isn't slow, just not reliable with slower lenses. A used EOS 3 is a better choice for F4 glass and doesn't cost much more than a 1N.