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10-15-2010, 01:10 PM   #16
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QuoteOriginally posted by lovemehate Quote
I understand what your saying, I guess Its just not making it clear when looking lens hoods online what to buy, as I need to do this soon so that i can get them not too long after my cam arrives.

how about Fotodiox Lens Hood for Pentax Ph-Rba SMC DA 18-55mm f/3.5-5.6 AL II Zoom Lens as 38741 on my 18-55mm f/3.5-5.6 AL

and Zykkor 49mm Universal Telematic Wide/Zoom 3 Position Rubber Lens Hood on my Pentax SMCP-A 50mm f/2.0 Lens?
Well, for what it's worth those are essentially the same hoods I use on my lenses equivalent to your two first purchases (different manufacturers, but very similar materials and design.) Test it, but you can almost certainly use the rubber hood in the longest (telephoto) position without vignetting, at least I can on my 50mm.

10-15-2010, 02:58 PM   #17
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So do I need to buy both I linked? To cover both lenses?
10-15-2010, 03:03 PM   #18
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QuoteOriginally posted by lovemehate Quote
So do I need to buy both I linked? To cover both lenses?
Yes. In fact, you do.
10-15-2010, 07:24 PM   #19
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QuoteOriginally posted by lovemehate Quote
So do I need to buy both I linked? To cover both lenses?
If your 18-55 did not come with a hood, you should buy the Pentax-brand hood to fit. The appropriate hood to use with your A 50/2 is another matter. I would suggest buying one of heavystar's excellent and inexpensive hoods from eBay.

New! Metal 49mm Standard Screw-in Lens Hood - eBay (item 360269372185 end time Nov-01-10 13:15:12 PDT)

-- or with a 52mm cap included --

New Metal Standard 49mm Screw-in Lens Hood + Cap - eBay (item 200517552685 end time Nov-07-10 12:58:57 PST)

The "standard" size hood in 49mm thread is deep enough for use with a 50mm lens on APS-C but does not vignette when used on 35mm film. I have several of these hoods and am very happy with them. It helps too that the seller is very quick to ship and does not gouge on the shipping.


Steve

10-15-2010, 11:49 PM   #20
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thats a nice one i think ill pick that up for the 50mm

what did u think for the 55mm?

the Fotodiox Lens Hood for Pentax Ph-Rba SMC DA 18-55mm f/3.5-5.6 AL II Zoom Lens as 38741 - ?
10-16-2010, 12:35 AM   #21
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QuoteOriginally posted by lovemehate Quote
thats a nice one i think ill pick that up for the 50mm

what did u think for the 55mm?

the Fotodiox Lens Hood for Pentax Ph-Rba SMC DA 18-55mm f/3.5-5.6 AL II Zoom Lens as 38741 - ?
Buy it, and when you get it mount it on your lens and see if the hood causes any vignetting at 18mm. If it doesn't, then it's keeper. An original Pentax replacement hood, you can practically buy another kit lens for what it will cost you. Any hood is better than no hood, as long as the hood doesn't cause vignetting.

Thanks,
10-16-2010, 01:12 AM   #22
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wait, whats vignetting again?
10-16-2010, 04:51 AM   #23
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QuoteOriginally posted by lovemehate Quote
wait, whats vignetting again?
Light fall-off at the corners. There is currently a thread about using DA lenses on old film bodies; if you look at that thread there are some examples of vignetted pictures.

Or google it. :-)

10-16-2010, 06:58 AM   #24
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QuoteOriginally posted by lovemehate Quote
thats a nice one i think ill pick that up for the 50mm

what did u think for the 55mm?

the Fotodiox Lens Hood for Pentax Ph-Rba SMC DA 18-55mm f/3.5-5.6 AL II Zoom Lens as 38741 - ?
I have this hood. It works perfectly for the kit K-x lens. It is a direct copy of the Pentax one even including the cutout for adjusting a polarizer.
10-16-2010, 10:06 AM   #25
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QuoteOriginally posted by lovemehate Quote
wait, whats vignetting again?
Let's say you're using a wide angle lens or you're at a wide angle setting on a zoom lens, like 18mm:

If you use a very long hood, because of the wide angle of view, the lens will actually "see" the interior of the hood and you'll see darkening in the edges of the photos, where the hood is "blocking" the image.

I own some dedicated hard lens hoods, but I also use a Cokin system with snap-on hood modules so I can make the hood as long or short as I want it. I have the rings in all filter diameters...an inexpensive holder slides onto the ring...and the hood modules snap onto that.

It's like this:

3x P-series hood for Cokin 84mm system *NEW* - eBay (item 230538908130 end time Nov-14-10 18:20:20 PST)

So whatever lens I use, I use the appropriate ring, and snap on as many hood modules as I think I need.
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