ef 85mm f/1.8 hunting focus

40197 · 25th February 2009

Hi guys,

I've just bought a Canon ef 85mm f/1.8. Really like the lens but found out that sometimes the lens seem to be hunting quite a bit in well lit condition. I do understand the minimum focus distance and that focusing require different shade in order for the lens to focus.

Can anyone kindly advise if the lens need to be send to csc for checking or its the nature of the lens.

p.s I just bought it today.

Thanks.

bEnd1ck · 25th February 2009

Originally Posted by 40197

Hi guys,

I've just bought a Canon ef 85mm f/1.8. Really like the lens but found out that sometimes the lens seem to be hunting quite a bit in well lit condition. I do understand the minimum focus distance and that focusing require different shade in order for the lens to focus.

Can anyone kindly advise if the lens need to be send to csc for checking or its the nature of the lens.

p.s I just bought it today.

Thanks.

Bought brand new?? Can go back to shop within 7 days for 1 to 1 exchange. Ask to test a few other copies to cfm if theres a prob with yours.

Octarine · 25th February 2009

Originally Posted by 40197

I've just bought a Canon ef 85mm f/1.8. Really like the lens but found out that sometimes the lens seem to be hunting quite a bit in well lit condition. I do understand the minimum focus distance and that focusing require different shade in order for the lens to focus.

That's only one side of it. The 2nd part are the AF sensors that need to pick up the patterns, guide the lens and lock the focus. Try to use the center focus point and have the contrast pattern in the the central region of viewfinder.
I know that my cam (350D) has some weakness in the AF part compared to higher end bodies.

40197 · 26th February 2009

Thanks guys.. I guess I'll verify another copy.

Thanks a million =))

neubdetat · 26th February 2009

make sure you're not aiming at a white wall or something with no contrast at all...

estel · 27th February 2009

85 f/1.8 focusing is usually quick and accurate.

Was it a tricky scene that you were trying to shoot?

40197 · 27th February 2009

Thats what i felt too when i tested the lens at other store. however there's only 1 left in the store i bought, and somehow this lens seem to hunt when i randomly focus anywhere (not the white wall). Will get clarification from the store and update again =)

25th February 2009	#1
40197 New Member Join Date: Dec 2008 Posts: 37	ef 85mm f/1.8 hunting focus Hi guys, I've just bought a Canon ef 85mm f/1.8. Really like the lens but found out that sometimes the lens seem to be hunting quite a bit in well lit condition. I do understand the minimum focus distance and that focusing require different shade in order for the lens to focus. Can anyone kindly advise if the lens need to be send to csc for checking or its the nature of the lens. p.s I just bought it today. Thanks.

26th February 2009	#4
40197 New Member Join Date: Dec 2008 Posts: 37	Re: ef 85mm f/1.8 hunting focus Thanks guys.. I guess I'll verify another copy. Thanks a million =))

26th February 2009	#5
neubdetat Member Join Date: Dec 2008 Location: Singapore Posts: 67	Re: ef 85mm f/1.8 hunting focus make sure you're not aiming at a white wall or something with no contrast at all...

27th February 2009	#6
estel Member Join Date: Jul 2006 Posts: 344	Re: ef 85mm f/1.8 hunting focus 85 f/1.8 focusing is usually quick and accurate. Was it a tricky scene that you were trying to shoot?

27th February 2009	#7
40197 New Member Join Date: Dec 2008 Posts: 37	Re: ef 85mm f/1.8 hunting focus Thats what i felt too when i tested the lens at other store. however there's only 1 left in the store i bought, and somehow this lens seem to hunt when i randomly focus anywhere (not the white wall). Will get clarification from the store and update again =)