question about filters and IQ

Started Aug 5, 2014 | Discussions thread
stevo23 Forum Pro • Posts: 18,601
Re: question about filters and IQ

scorrpio wrote:

Sir Canon wrote:

yes but a shattered front element costs way more.

Show me one situation where an impact heavy enough to shatter the extremely thick, curved, tough and internal strain-free (strains cause optical aberrations) front element would be averted by a 1mm-thick flat piece of glass? There are plenty of shattered filter pictures out there. That's what they are: filters shattered by impacts that the lens itself would just shrug off. Might as well put a porcelain cup on a steel plate, drop a brick on it, and claim that the shattered cup 'prevented damage to the steel plate'. Me, I am yet to see a shattered element that would have been saved by a filter. BTW, it is not THAT expensive. Google about it - about $280 parts and labor for 70-200 f/2.8L IS II USM. Around $150 for 17-55 f/2.8. Plus the cost of the filter, if there was one.

Show me one study by any filter maker where lens are subjected to various types of damage, with and without filters - showing that filter makes a difference. I am not talking about conditions where you got flying shrapnel or spray paint in the air. After shoots like that, you take the filter off and put it in the garbage. Probably wouldn't use a Heliopan. And with that much gunk in the air, it probably won't matter anyway if the filter is a $5 or $150 one.

So you're arguing against a filter, but giving good reasons to buy one here.

As to getting an occasional ding or scratch? A hood will prevent vast majority of those, and as to how a scratched lens performs, see this:

Forget performance, resale value goes in the toilet. Not to mention the myriad of things that can actually ruin performance.

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