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04-27-2016, 10:17 AM   #1
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DA 16-85 case and CPL

I recently purchased a DA 16-85 zoom and was disappointed it didn't come with a case. The "official" Pentax pouch is expensive and hard to find so I'm looking for other options.

I'm also looking for a reasonably priced circular polarizing filter and would appreciate any suggestions.

Thanks!

04-27-2016, 10:37 AM - 1 Like   #2
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QuoteOriginally posted by JimS_256 Quote
I'm also looking for a reasonably priced circular polarizing filter and would appreciate any suggestions.
I've had good results with Marumi and B+W. But keep in mind all brands have various grades. The really expensive ones, just like anything else, are only slightly better than the less expensive ones but that last few percentage points of improvement gets expensive. On the other hand the really inexpensive ones are not a good buy either.

Try to get one that has good threads on the front so you can fit a lens cap on. Some of the 'slim' ones don't have threads on the front. Also, multi-coated is a must as far as I'm concerned but YMMV.

I just ordered a CPL from these guys: Breakthrough Photography, they are new and getting good reviews but we will see if they live up to their press.
04-27-2016, 10:59 AM - 1 Like   #3
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QuoteOriginally posted by JimS_256 Quote
I'm also looking for a reasonably priced circular polarizing filter and would appreciate any suggestions.
So far I've had B+W Käsemann, Marumi DHG and Hoya HD. The B+W was flawless but pricey, the Marumi optically sound by difficult to clean (you could wipe around on it as long as you wanted to with a clean microfibre cloth and there would still be colourful smears), now I have the Hoya which is great. Very good optically, slim, good material quality, easy to clean and a bit more affordable than the B+W one.

Good things are also said about Haida filters. I have their ND1000 which is flawless, their CPL is supposed to be similar.
04-27-2016, 11:31 AM - 1 Like   #4
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QuoteOriginally posted by JimS_256 Quote
I recently purchased a DA 16-85 zoom and was disappointed it didn't come with a case. The "official" Pentax pouch is expensive and hard to find so I'm looking for other options.

I'm also looking for a reasonably priced circular polarizing filter and would appreciate any suggestions.

Thanks!
Many people suggest buying only a model that is multi-coated. The cheapest filters are uncoated. The second cheapest have only a single coating on each surface. Multi-coated models are moderately to very expensive. The packaging on many filters often makes no mention of whether the filter is uncoated, single-coated, or multi-coated. The manufacturers' websites often provide no or few clues.

I don't know how much difference multi-coating makes if the composition of the photo doesn't include direct sunlight, and there isn't much consensus on these forums.

04-27-2016, 11:42 AM   #5
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QuoteOriginally posted by pete-tarmigan Quote
Many people suggest buying only a model that is multi-coated. The cheapest filters are uncoated. The second cheapest have only a single coating on each surface. Multi-coated models are moderately to very expensive. The packaging on many filters often makes no mention of whether the filter is uncoated, single-coated, or multi-coated. The manufacturers' websites often provide no or few clues.

I don't know how much difference multi-coating makes if the composition of the photo doesn't include direct sunlight, and there isn't much consensus on these forums.
It is a bit more complicated than this though. There are a lot of dirt cheap filters out there that are not worth their money but advertise multiple fancy coatings. Conversely I use a Haida ND1000 which has been noted in several reviews to perform as well as B+W or Lee filters. It is entirely uncoated, and the same reviews claim that they could not see a difference between it and the new, more expensive multi-coated version.

So while overall multi-coated filters should perform better than uncoated filters, there are high quality uncoated filters that perform very well and cheap multi-coated rubbish that doesn't perform well at all.
04-27-2016, 12:11 PM   #6
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I found this useful: Polarizing filters test 2015 - Introduction - LensTip.com

There are very few real test reviews on CPLs, so this is about the best info available.
04-27-2016, 04:09 PM   #7
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Thanks everyone for your helpful comments. I am assuming, since this is a very wide angle zoom, that I should be looking at one of the thinner designs...?

My philosophy is "almost as good and a lot cheaper" so I'm hoping to find something affordable that will still provide decent results, especially since this will be a fairly large (72mm) filter.

04-27-2016, 08:43 PM - 1 Like   #8
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You'll find that using a POL filter at wide FL's can be problematic -- the change in sun angle across the wide view also changes the appearance of the polarizing effect. Sort of like a grad ND filter.
04-29-2016, 10:11 AM - 1 Like   #9
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Nobody answered regarding cases, so I'll bite. The best (and among the cheapest) case I've found is the Op-tech. I believe I have the medium but would have to measure. It even has a place to store that filter you're looking for. Enjoy.
04-29-2016, 11:32 AM   #10
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QuoteOriginally posted by JimS_256 Quote
Thanks everyone for your helpful comments. I am assuming, since this is a very wide angle zoom, that I should be looking at one of the thinner designs ..?
On APS-C 16 mm isn't really very wide-angle. I used a rather thickly rimmed CPL on my 18-55 without any problems, so I would assume it would also work on 16 mm. But the Hoya I suggested is rather slim anyway.
04-29-2016, 12:39 PM - 1 Like   #11
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QuoteOriginally posted by FantasticMrFox Quote
So far I've had B+W Käsemann, Marumi DHG and Hoya HD. The B+W was flawless but pricey, the Marumi optically sound by difficult to clean (you could wipe around on it as long as you wanted to with a clean microfibre cloth and there would still be colourful smears), now I have the Hoya which is great. Very good optically, slim, good material quality, easy to clean and a bit more affordable than the B+W one.

Good things are also said about Haida filters. I have their ND1000 which is flawless, their CPL is supposed to be similar.
+1 on the Hoya HD. I had a cheaper CPL which made it impossible to achieve sharp images with an HD 55-300 WR. The Hoya is sharp and also easy to clean which persuaded me to buy it over the Hoya Pro1. It also has higher light transmission than the Pro1.

04-29-2016, 06:10 PM   #12
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QuoteOriginally posted by bdery Quote
Nobody answered regarding cases, so I'll bite. The best (and among the cheapest) case I've found is the Op-tech. I believe I have the medium but would have to measure. It even has a place to store that filter you're looking for. Enjoy.
Thanks! I have have an Op-Tech sling strap that works very well. Those look like a good option.

---------- Post added 04-29-16 at 06:28 PM ----------

QuoteOriginally posted by pacerr Quote
You'll find that using a POL filter at wide FL's can be problematic -- the change in sun angle across the wide view also changes the appearance of the polarizing effect. Sort of like a grad ND filter.
That's a good point, thanks for bringing it up. I wonder how much of a problem this is at this focal length. Hopefully someone who uses this lens and a CPL can chime in...

QuoteOriginally posted by FantasticMrFox Quote
On APS-C 16 mm isn't really very wide-angle. I used a rather thickly rimmed CPL on my 18-55 without any problems, so I would assume it would also work on 16 mm. But the Hoya I suggested is rather slim anyway.
Hmmm, I wonder? I've been using the 18-135 as my main "walkaround" lens and I was surprised at how much wider this one is. 2mm at the short end makes a bigger difference than I was expecting.

Kind of off topic but I'll add that I bought this lens to complement, not replace the18-135. My wife expressed an interest in photography and is now using my K-50 (I upgraded to a K3 II) so I found myself in need of a second "walkaround" lens. I considered getting another 18-135 because I really like that lens but I was intrigued by the 16-85. If I had to choose only one it would be the 18-135 because I mostly shoot at the longer end but I'm really enjoying the 16-85. Having a wider option is fun.
04-29-2016, 07:52 PM   #13
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QuoteOriginally posted by JimS_256 Quote
2mm at the short end makes a bigger difference than I was expecting.
It's the percentage of change that counts: e.g., 2mm at 16mm is a 12.5% change while at 100mm it's 5% and at 200mm it's only a barely noticeable 1%.

As for POL angle-off differences - it varies. Take most any POL filter and look at the clear sky or reflections on water. Watch the change as you pivot from on-axis to the sun to 90 off axis and compare the change with the angle-of-view of your lens relative to the intended scene.
04-29-2016, 08:46 PM - 1 Like   #14
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QuoteOriginally posted by JimS_256 Quote
That's a good point, thanks for bringing it up. I wonder how much of a problem this is at this focal length. Hopefully someone who uses this lens and a CPL can chime in...
Using a CPL at anything less than 24mm on APS-C will give poor results if the sky is a significant portion of the image. Here is an example that actually isn't too bad. I made this mistake on a trip to Crater Lake and ended up deleting a lot of bad images. This one is one of the less bad ones. But see how the sky gets very uneven:
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04-30-2016, 12:48 PM   #15
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QuoteOriginally posted by pete-tarmigan Quote
Many people suggest buying only a model that is multi-coated. The cheapest filters are uncoated. The second cheapest have only a single coating on each surface. Multi-coated models are moderately to very expensive. The packaging on many filters often makes no mention of whether the filter is uncoated, single-coated, or multi-coated. The manufacturers' websites often provide no or few clues.
That's right. Manufacturers aren't always clear about multi-coatings, nor are the clear exactly how many coatings a multi-coated filter might have, nor about the quality of those coatings.
While sometimes you won't see any difference between a single or non-coated filter and a filter with quality multi-coatings, sometimes you will. I've had lots of trouble, for example, shooting waterfalls with single coated filters. I had a cheaper Hoya filter that flared quite badly while photographing a waterfall in Crater Lake NP. Replaced it with the Hoya HD and haven't had any problems since.
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