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05-23-2011, 06:48 AM   #1
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is the built-in hood an obstacle?

I'd like to buy a DA 35mm macro limited, however I fear that as written here Pentax DA 35mm f/2.8 Macro Limited Lens Review the hood could get in while I shoot macros. I would buy it especially for taking outdoors macro shots (in the woods), therefore it would be a bad choice to have a hood that comes out when pointing downward...
Could someone reassure me in this regard?

05-23-2011, 07:00 AM   #2
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It doesn't slide out unless you pull it.

No problem.
05-23-2011, 07:01 AM   #3
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QuoteOriginally posted by Aegon Quote
It doesn't slide out unless you pull it.

No problem.
What he said

It doesn't come out unless you pull it out, so I wouldn't worry about it.
05-23-2011, 08:07 AM   #4
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I own a very old M135/3.5 with a similar built in hood that is well worn and it still doesn't come out on it's own. No issues with my few others with built in hoods either.

05-23-2011, 08:27 AM   #5
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I have various lenses with built-in hoods that don't slide out on their own, no problem.

I also have several macro lenses with deep front insets, again no problem. The deep inset acts as a lens hood, and also prevents the shooter from attempting to approach a subject too closely.

Not that you can usefully approach too close anyway; one law of optics is that no unreversed lens can focus closer than its focal length, which is where magnification= 1:1. Some may point out that supplemental optics such as a corrected Raynox adapter or an uncorrected +dioptre mensicus will allow closer focusing. But such supplemental optics change the focal length of the optical system, so the law still applies.
WD >= FL -- it's not just smart, IT'S THE LAW!
But I digress. To avoid any concerns about close focus, use a 35mm enlarger lens on macro tubes. NOT on bellows -- the bellows rack will impede a close approach, much more so than any slippery lens hood. Oh, and if your built-in lens hood happens to have been greased or otherwise souped-up so it slides out on its own, just tape it down. Gaffer's tape leaves no residue.
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