Sigma 70-200 f/2.8 lens- have to push down to get it to work


dinneenp

Link Posted 01/09/2022 - 19:55
Hi,
I have a Sigma 70-200 f/2.8 lens, which I love. Recently when connected, the top lcd screen flashes F-- and it won't focus. I have to push the lens down to get it to work.

Any idea what the problem could be please?

Thanks,
Pa.
Cheers,
Pa
http://www.photoblog.ie where every post have a musical reference as it's title.

Mike-P

Link Posted 01/09/2022 - 21:26
Check the screws on the lens mount, they have a habit of coming loose on some of the Sigma lenses.
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walkeja

Link Posted 02/09/2022 - 11:32
I have always said Sigma lenses were rubbish, which is why I only buy Pentax lenses.
Pentax K1-ii and MZ6
Pentax Lenses 28-80 F, 300 DA*, 80-200 F, 35 F2.4 AL, M50 F1.7, 28-105 DFA, 20 F4 SMC
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HarisF1

Link Posted 03/09/2022 - 11:09
walkeja wrote:
I have always said Sigma lenses were rubbish, which is why I only buy Pentax lenses.

It's a bit unfair on them to say they're totally rubbish haha

I'd say Pentax only need to get one mount right whereas Sigma need to get four mounts and systems right to be successful (with reverse engineering too).

The bit that gets me is that they do this with three mount screws instead of the five that Pentax lenses have.
All the gear with no idea

Jonathan-Mac

Link Posted 03/09/2022 - 11:32
walkeja wrote:
I have always said Sigma lenses were rubbish, which is why I only buy Pentax lenses.

Some of the old lenses from when Sigma competed only on price are poor but then so are many Pentax lenses from the same era.

These days Sigma lenses are every bit as good as Pentax ones.
Pentax hybrid user - Digital K3, film 645 and 35mm SLR and Pentax (&other) lenses adapted to Fuji X and Panasonic L digital
Fan of DA limited and old manual lenses

MHOL190246

Link Posted 03/09/2022 - 13:42
I had a similar issue with a Sigma 70-300. Each time is happened I had to remove the lens and clean the contacts with a soft cloth. That used to fix it until next time the fault occurred.

Michael
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