What's the purpose of a hood being vented?

[Brad Bireley]

What is the purpose?

Brad

 

[bmattock]

Makes it go faster. A turbo hood.

No, really. They are often vented so that they will block stray sunlight from the lens, but won't block the rangefinder or viewing window from your eye.

Best Regards,

Bill Mattocks

 

[Michiel Fokkema]

Hi,

It's vented so that it won't block your VF.

Cheers,

Michiel Fokkema

 

[jaapv]

But not always- some hoods, for instance the Heavystar hood for 50 mm lenses are vented whilst clearing the viewfinder. There it seems to be for "design" purposes

 

[ch1]

I would have guessed that it is a weight-saving measure but am curious myself....

 

[ywenz]

to let the hot steam out of the camera

 

[planetjoe]

to let the hot steam out of the camera

I like that one. Nicely done.


--joe.

 

[bmattock]

Translation for ex-colonists - a 'fag' is a cigarette in Britain. Very different meaning from stateside.

Much like being told by a friend that he'd pop by and knock me up in the morning. It was a bit of an eye-opener.

Best Regards,

Bill Mattocks

 

[lushd]

I have always believed it was to not obscure the viewfinder ... but the Leica one for the 50mm Summicron looks like it would grate cheese quite well. Has anyone tried?

 

[principe azul]

But not always- some hoods, for instance the Heavystar hood for 50 mm lenses are vented whilst clearing the viewfinder. There it seems to be for "design" purposes

The hood also works on 35mm lenses, where the lower right of the VF would be completely blocked without the vent, at least on a 0.72x finder. The hoods are generic, sold by filter thread and not by lens - Heavystar (or americaneagle or whoever) doesn't know which lens and which body you'll be using the hood with.

 

[principe azul]

... but I do agree they're a cool design. If they sold them in 52mm sizes, I'd be tempted to have a vented hood with my F3.

 

[Flyfisher Tom]

... but I do agree they're a cool design. If they sold them in 52mm sizes, I'd be tempted to have a vented hood with my F3.

That's where a Dremel power tool comes in 😛

 

[principe azul]

http://www.rangefinderforum.com/forums/newreply.php#
Smilie No way, I've already written off a Moskva-5 like that attempting modifications...

 

[ClaremontPhoto]

Mates of mine will often say "I'm going out for a fag." And they just want to smoke a cigarette.

 

[Avotius]

I always thought it was so you could turn a circualr polarizer, my old mamiya had a vented hood area that wasnt even near where the veiwfinder was being blocked off

 

[amateriat]

Yes, the vents are there to (mostly) keep out of the VF's way. On my Konica Hexar RF's 28mm f/2.8, the vented hood "pivots", allowing the photographer to adjust the positioning of the vents for minimum obstruction. Can't imagine they were the only ones to think of this.


- Barrett

 

[Fedzilla_Bob]

The vents lower the drag coefficient when holding your MP out the window of your speeding Carerra.

 

[Creagerj]

If only. That is if only I had the money to hold an MP out of a speeding carerra.

 

[bmattock]

The vents are so the camera does not slow down too much due to wind drag as you swing it in a rapid arc at the end of its strap towards the fat head of a guy who asks you what a vented hood is for. Also, it is a whistle. Whistle while you work, that's it.

Best Regards,

Bill Mattocks

 

[Ken Ford]

The vents lower the drag coefficient when holding your MP out the window of your speeding Carerra.

It's hell cleaning the bugs out of the spokes of the hood, though....