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Comment by jules posted on K5 reaches the end of the road... at 02/03/2012 - 10:16
Just for kicks:arrow:
http://www.digitalrev.com/article/uv-filter-vs-no-uv/OTMwNA_A_A
Yes it's Kai, makes about as much sense as "Top Gear" but occasionally has a point.
Look were never all going to agree on this, suffice to say I'll not put a filter on a lens unless I know it was going to be at risk for everything else there is the hood (Mastercard!)
"Interesting comments about using a filter to protect the lens. I can accept that adding a 'protective' filter such as a UV or Skylight could, to a very small degree, affect image quality - though generally not in my experience.
However, if, like me, you spend quite a lot of time crawling about in the undergrowth with a 1:1 macro lens, extension tubes etc., then with the subject inches or less away and the prospect of scratching from branches/twigs and the like, it is common sense to protect the lens imho. You can of course always remove a filter as and when, but too late to add one 'after the event"
It was never meant to sound like you should never protect, for me for normal use thats what the super protect coating does, it doesn't rub off! If I was taking pics of someone welding I may change my mind, just that I don't feel that filters are necessary for "Normal" (Define your own normal)use...
Everyones circumstances are different, I too blunder around in the undergrowth but have learned always to have the Lenshood in position and thus far have had no troubles, also I have genuinely had problems with filters on several Lenses in the past affecting Autofocus flare ghosting etc and came to the conclusion that they are just not worth the risk of ruining a whole shoot for, which has happened!
The pictures/moments can't be retaken or relived and anything that comes between me and that goal is binned!
That includes superflous glass, I mearly pointed out Thom Hogans opinion as an experienced outdoorsman who agrees with my position, I'm sure there are thousands who don't! Then there are many thousands who are trying to get you to buy something you don't need too
Comment by jules posted on Ok Ok I know! 17-70 Vs 16-50 at 02/03/2012 - 09:47
Comment by jules posted on Ok Ok I know! 17-70 Vs 16-50 at 02/03/2012 - 07:57
http://www.pentaximaging.com/about/press/267
Comment by jules posted on K5 reaches the end of the road... at 02/03/2012 - 07:17
Comment by jules posted on Should I buy 21mm Ltd at 02/03/2012 - 06:38
QUOTE
Q: "Which filter should I buy to protect my new lens?"
A: I don't believe in filters for protection on lenses, with the possible exception of a situation where I know dangerous chemicals might be thrown at the front element of the lens (e.g. in a chemical factory). Filters always rob a bit of light (and in some cases, a lot of light), increase flare tendencies, and add to your equipment cost. To date, I've not seen a single controlled study that shows that filters actually offer real protection. Indeed, some of us believe that the opposite is sometimes true with cheap filters: if a glass filter shatters it tends to scratch the front element of the lens. The real reason why every store salesman asks you if you'd like a protective filter with that lens you just bought is because it increases the stores profit margin. Considerably. Consider a US$1000 lens and US$50 filter. The store will make US$150 on the lens, US$25 or more on the filter. Thus, even though the filter added only 5% to the cost of your lens, it added 17%+ to the dealer's profit.
UNQUOTE
Comment by jules posted on Ok Ok I know! 17-70 Vs 16-50 at 01/03/2012 - 23:39
Again though it's down to how secure you feel about it, One mans goose is another mans gander, I guess.
I flogged all my filters on Ebay and made a tidy sum Mike
And finally!
A couple of Thom Hogan's whitticisms
Which filter should I buy to protect my new lens?
An insurance policy.
No, I mean what UV filter?
Your skin needs a UV filter more than your lens does. I particularly like Blue Lizard suntan lotion, since the bottle turns blue when exposed to UV, which is cool. Not too greasy and withstands some water immersion.
Stop kidding around. I need a filter to protect the front of my lens, what should I get?
If you're serious about getting a protective filter I suggest you go to your local camera store, find the salesperson with the least experience, and ask them. They'll know what to sell you.
:arrow:
Comment by jules posted on Ok Ok I know! 17-70 Vs 16-50 at 29/02/2012 - 23:21
Comment by jules posted on Ok Ok I know! 17-70 Vs 16-50 at 29/02/2012 - 22:33
Yup, Spend the best part of £600 on a decent lens and then stick another layer of glass in front of it.
By all means buy a filter and use it when near salty water or if there is danger of the front element being damaged but otherwise leave it off.
I have a big pile of Hoya professional / B&W / Kenko filters in the cupboard from used lenses I have bought. They get taken off as soon as the lens arrives and never see daylight again.
I used to UV every Lens, now I only carry a few filters for emergencies
CPL/ND and a Clear protect but that may go due to the SP coating on the Pentax Lenses I intend to buy.
Put the hood on and you'll never damage the front element, and the lens coating takes care of the rest...
Comment by jules posted on Ok Ok I know! 17-70 Vs 16-50 at 29/02/2012 - 22:15
Comment by jules posted on Monitor calibration that adjusts brightness/contrast? at 29/02/2012 - 17:11



I don't know why everyone constantly frets/worries about 'new models' and 'discontinued models'. It is a fact of commercial business and progressive development that each model will have a very short lifespan, unless it becomes a 'cult classic' and continues for this reason, or it is cheap to make and fulfils a role in developing markets (think VW Beetle, Morris Oxford). I too have just bought a K-5. It will work exactly the same as it does now (which is very well BTW) regardless of whether Pentax replace it or not.
Stop worrying about whether or not your camera will be discontinued and concentrate on taking the best pictures you possibly can with what you have already got!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Regards
David
Actually I'm toying with saving for the Silver one and forgoeing what comes next? Two iterations of a super handling body is a great run but I'm not convinced that there is a Camera Manufacturer in the world that won't stuff up the third somehow
We'll see...