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標題: Questions about diff filters and where to buy CPL and UV filters? [打印本頁]

作者: 布小熊 時間: 2010-4-21 09:46 標題: Questions about diff filters and where to buy CPL and UV filters?

The questions started from here:
http://www.loyaukee.com/forum/re ... =177153&fromuid=190

Hi since I will be taking snow scenery pictures, CP suggested me to get CPL and ND filters for my camera. How about UV filter?

I think I sorta know what the other 2 filters work but what exactly does ND filter do? I read wiki but don't quite get it...

I have 2 kit lenses, should I get 2 CPL or get a step up ring?
Read that: 18-55 has a 52mm thread. the 55-300 has a 58mm thread

so I need to 4 filters in total for 2 lenses??

Planning to buy Hoya CPL filter but should I get multi-coat ones? Are the cheapo one OK too? Since I am only using the kit lenses right now. And what is the right place to get them? Amazon has them for like > $50US... not cheap for me... @ @

Is that much cheaper in HK? Should I ask my friends to get those in HK? (but they don't know photography...so it may be hard...)

作者: Lik 時間: 2010-4-21 10:11

For the most part, I only consider UV filters to be a protective and sacrificial filter. If it gets scratched or dinged, I toss it out and get a new one.

For landscape photographers, ND filters are quite important because it allows you to control the amount of light that gets through to the sensor. That is to say, instead of relying on your ISO, aperture, and shutter speed to control the amount of light, you use the ND filter to do this job instead, and you gain the freedom to pick and choose the desirable ISO, aperture, and shutter speeds to give you the effect you want.

For example, if you're at this super bright scene in the mountain waterfalls, and you want the best IQ while getting this smooth flowing water effect, you are pretty much forced to shoot at ISO 100 and F/8 (b/c they give the best IQ). At F/8, however, your shutter might be 1/250 or something, so you get a freeze motion waterfall instead of a flowing one. Picking the right ND filter will allow you to slow your shutter down to 1/30 to get the water-flowing effect while obtaining proper exposure.

As to CPLs, I wouldn't bother with multi-coats or anything fancy since you are using the kit lense for now. Any benefits from the higher end CPLs would be lost through the kit lense. I'd start with a cheap CPL or a used one on your kit lense first -- you'll likely get more use out of the CPL from a wide angle lense than a telephoto one.

Personally, I mostly only use a CPL when I am shooting landscape (and thus the wide angle). It certainly has other uses as well (such as eliminating window glare and reflections), but I find that for the stuff I shoot, I rarely bother with a CPL for anything other than wide angle shots (esp when I want that deep sapphire blue sky).

-Lik

作者: Lik 時間: 2010-4-21 10:19

One more thing is, given the way ND filters work, it seems to me that it wouldn't be enough to just get 1 ND filter. To allow yourself the enough flexibility, you'll probably need at least a few of them to choose from, depending on the situation and the amount of light available.

Granted, I've never used ND filters myself, so I don't know how many ND filters you'll actually need in practice to get by and achieve the effects you want. Also, bear in mind that a typical CPL will reduce the amount of light available by about 2 stops.

And I won't even talk about graduated ND filters la...

-Lik

作者: siumaibb 時間: 2010-4-21 10:51

I think carrying / switching filter is a hassle for traveling, so if you're not taking serious landscape photos, just use PS or Lightroom to correct your picture afterward lor.

作者: 布小熊 時間: 2010-4-21 11:00

Well, I don't have nor use PS... @@
And since I am such a beginner for photography, I will just get 1 CPL filter for my 18-55 lense. And prob get UV filters for both as protective filters. (if I am shopping onlilne, that saves shipping)
ND sounds too complicated to me for this stage.

作者: sheep 時間: 2010-4-21 11:00

as for my limited knoledge, I'll only use a polarized filter because it has the same function of a ND. Polarized filter limit the reflection from entering the lens makes color more satuated.
For UV, I think it is more useful in film photography and as LIk said, a protective filter

作者: khaki 時間: 2010-4-21 12:23

bear, no need ND

作者: 布小熊 時間: 2010-4-21 12:24

回復 7# khaki
right right no ND for bear.

作者: khaki 時間: 2010-4-21 12:27

回復 8# 布小熊

I don't wanna see you end up spending hundreds for useless filters

作者: siumaibb 時間: 2010-4-21 12:53

回復 5# 布小熊

at least get lightroom, it makes a big difference.......

作者: Catpiano 時間: 2010-4-21 13:49

Filter, buy from ebay, or BH is fine.

Hoya is good enough, don't really need Heli or BW.

CPL is good to hv, for ice field. (set to ~ +2/3 to +1ev when taking pic IN icefield)

作者: tofu 時間: 2010-4-24 18:01

when my mum got her dslr, the salesperson told her just get the hoya uv one, since it is a kit's lens. i checked the price and surprise fs & bb are just few dollars more expensive than b&h or online store. however they don't have all sizes online. you need to check the store.

作者: chobit 時間: 2010-4-25 02:08

I have ND filter which I hardly use anymore, but then I take it with me to places like yellowstone or something.
You don't normally need more than 1 ND, unless you know what you are doing. I have a Tiffen .9 ND which is a 9 stops ND, they also have .3 & .6. CP gives you approx 1.5 stops only.

If you think .9 is too much, you can always try .3 or .6 and add a CP on top if you need more light being block as well.

eg. use the sunny 16 as an example.
under bright sun light our camera need proper exposure of approx 1/100 @ f/16.

If this is a water fall you need to capture some motion. A .9 ND can get you the following.

f/8 (2 stops), then approx 1s for shutter speed.

Good luck

作者: startroops 時間: 2010-4-25 18:22

I am more of a landscape fotog and I will never travel without my CPL and gradual ND. Some of my better photos were taken using the combination of these two filters.

Personally, I'd just get a CPL filter 'cause it can serve two purposes: lens protection and photo enhancement. Until recently I have only had CPL on my lenses until I needed to shoot a lot of indoor photos while I was in NYC. One thing to keep in mind is to get a thin CPL if you have a really wide lens. I noticed the black corners a lot when I used my regular Hoya CPL with the 12-24; though it did add a nice feel to some of the photos.

作者: startroops 時間: 2010-4-25 18:25

As to where to buy them, I guess either online through BH or at the 202 Factory Outlet? If you don't really mind paying a bit more, Broadway Camera or Kerrisdale Camera sell them too.

作者: chobit 時間: 2010-4-27 00:32

Wow.. I don't know too many people who would have CP on at all time, it's doesn't cause quite some image quality loss in quite some situation, unless you are actually after that particular effect. Either way, I think that's a preference, and it's fine as long as you can still take good pictures =D

I am more of a landscape fotog and I will never travel without my CPL and gradual ND. Some of my be ...
startroops 發表於 2010-4-25 18:22

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