Dylan777 said:
I use BW 007 Clear filter to protect my lenses from dust and water, plus easy cleaning. Lens hood to protect from hard bump.
Broken hood and scratchy filter are cheaper to replace
People say this all the time, how many times have you seen scratched modern front elements? I have been hand cleaning my 70-200 f2.8 IS lens for nearly ten years, it has never had a filter on it and has been soaked in sea spray (many times), it has crossed deserts, been rained on more times than I could count and it doesn't have even the smallest mark on it.
Where are all these damaged front elements to support the $80 a pop 'protective' filters? Besides, there have been many instances of broken filters scratching the front elements when the front element wasn't otherwise damaged, so deduct that number of incidents from the first number, add up the cost of them and deduct the cost of all the filters and, well, you get my opinion on 'protective' filters
I am not saying don't do it if you want to do it, I am saying I believe it is advice that has long outlived its practical application and is just repeated parrot fashion with no modern risk/benefit calculation analysis behind it. For instance it used to be much more difficult to get lenses repaired (the parts supply) than nowadays, the coatings used to be much less durable and prone to damage from cleaning, and the actual filters used to be much cheaper, that just isn't the case now so I believe the advice isn't valid either.
Just straight maths, if you have three 77mm lenses that is $250 in 'protection' filters, well first off you'd be far better off spending that $250 on an actual insurance policy to cover for other damage as well, and secondly, $250 will get most front elements replaced anyway if you are unlucky enough to damage one, I know that you can get a 17TS-E done for that and that has to be one of the worst.