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Re: [OM] metabones speed booster

Subject: Re: [OM] metabones speed booster
From: "philippe.amard" <philippe.amard@xxxxxx>
Date: Sat, 30 Aug 2014 15:49:37 +0200
Wiki: "the f-number N = f / D, with focal length f and aperture diameter D."

The actual amount of light that goes through the lens remains the same, just the math tricks us into believing that we gain anything in term of f-stop ;-)
I bet the light-meter won't be fooled by the advert.

Amities
Philippe

Le 30 août 14 à 15:17, Piers Hemy a écrit :

Metabones do claim an extra stop, and say that the effective focal length is 0.71x the actual. And the maths confirms that you do get a full stop. So
a 50/1.2 would be an effective 35/0.8. And a 24/2 - a 17/1.4.

Piers
On 29 Aug 2014 22:17, "Frank" <wijsmuller@xxxxxxxxx> wrote:

​Don't have one, but shouldn't a speedbooster give you an additional stop? To get a 180/1.4 equivalent? Or a 35-80/2? Hope you will elaborate on the
results..

Best, Frank.​


2014-08-29 14:29 GMT+02:00 SwissPace <ian@xxxxxxxxxxxxxxxx>:

Last night I was idly searching the internet and before my frontal lobe
could kick in a speedbooster for OM to X-Mount was ordered.

Buyers remorse is kicking in slightly as I begin to ponder the point, its
nice to have the extra reach the crop sensor gives for teles so why
would I
want to lose that and as good as the 24/2.8 is I don't see me using it instead of the fuji 14/2.8 (21mm equiv) , I do have a 17mm tokina kicking around plus the 8/2.8 and 35 shift and well maybe I will like using the 180/2 and 35-80/2.8 with it, but I guess the 90/2 100/2.8 etc.. will not
see much if any use.

Has anyone else actually bought one and is using it with OM lenses to
whatever camera mount you chose? any thoughts?

IanW
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