24-105 & Filters

I've been using a CP filter on the 24-105 L F4 and noticed that the images were soft. Seems that the filter confuses the autofocus system. Take the fileter off and it is pin sharp again.

I put a skylight filter on to protect the lens face more than anything else and again I noticed a softening of the images but this time only at the top end of the range (100 -105)

The filter are standard hoyas that I've used on my 100-400 without any problems that I've noticed.

Any thoughts ?

Cheers Dave

I don't have a CP, but purchased a B+W UV filter for my 24-105 when I got it last spring. I use the lens extensively indoors and out and have never experienced that problem. Were these inexpensive Hoya's, or the more expensive filters?

The more cost effective (aka cheaper ) versions

Picturesports wrote in post #2408523
The more cost effective (aka cheaper ) versions

There's the problem.

I use Hoya Multi-Coated UV filters and have no problems.


Andrew.

Ive read that if the polariser is a "Linear" type it can confuse AF systems, so they say! but ive also heard of many people without any problems.

Nick

Yeah, as has been stated I believe therein lies the problem. I know the better multicoated are painfully expensive, but that's the route you really need to take for the best images under all conditions.

Picturesports wrote in post #2408523
The more cost effective (aka cheaper ) versions

The light in NZ tends towards the harsh end of the scale, so living without is not going to be an option.

Any suggestions on manufacturers other than Hoya? Interesting that the same filter doesn't create the same problem with the 100-400

Hmmm..... can't explain that one. B+W is top notch and top price. I believe Heliopan is also up there.

Picturesports wrote in post #2408582
......Any suggestions on manufacturers other than Hoya? Interesting that the same filter doesn't create the same problem with the 100-400

I have noticed big time that my cheapo Ritz camera polarizer yielded horrible results. I guess you get what you pay for so I have ordered a B+W multi coated CP & they are expensive $145 compared to $35. I also ordered Tamron lens cap. Sure it might be seen as an insult to the "L" but they are convenient with a hood, Canon caps are a pain even without a hood (impossible to remove hooded) . Also to adjust CP I carefully use the tip of my finger to rotate it by the metal edge, at least on my 24-105 & 10-22 that is. Anyone concur ?
ps: I lightly sand the Tamron chrome letters & used a black Sharpie to blend it in.

Hoya make multi-coated CPLs.
I've got a few and my lenses (including the 24-105) are pin sharp.

Picturesports wrote in post #2408523
The more cost effective (aka cheaper ) versions

Yes, cheap filters are cheap for a reason.

yes you definitly need to get a high quality multicoated filter. i have the B+W 77MM MRC CP. use it on my 24-105 all the time. works great.

I use a B&W MRC UV filter on my 24-105 and never had any issues.

i had a tiffen on my old walk around lens and it was ehh soso. I went on ebay and found a hoya slim filter for $40 i believe.

Picturesports wrote in post #2408463
I've been using a CP filter on the 24-105 L F4 and noticed that the images were soft. Seems that the filter confuses the autofocus system. Take the fileter off and it is pin sharp again.

I put a skylight filter on to protect the lens face more than anything else and again I noticed a softening of the images but this time only at the top end of the range (100 -105)

The filter are standard hoyas that I've used on my 100-400 without any problems that I've noticed.

Any thoughts ?

Cheers Dave

Mine is OK with the SHMC pro 1 filters.

I think the standard Hoya's are not even multicoated, just single coated. Next up are the HMC and the the top end are the SHMC.

I have some notes on Hoya and B&W filter standard here:
http://www.zen20934.ze​n.co.uk …son%20of%20Some​%20Filters
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