Speedbooster just like a teleconverter?

2 months 1 week ago #669036 by Colorado Mike
I've been seeing more and more talks about Speedboosters as of late.  Are these things basically a teleconveter inversed acting as an optical magnifier?  That's all these things are right?  But teleconverters will cost you stops of light 2x teleconverter will cost you roughly 2 stops of light.  Does this still happen with speedboosters? 


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2 months 1 week ago - 2 months 1 week ago #669061 by Shadowfixer1

Colorado Mike wrote: I've been seeing more and more talks about Speedboosters as of late.  Are these things basically a teleconveter inversed acting as an optical magnifier?  That's all these things are right?  But teleconverters will cost you stops of light 2x teleconverter will cost you roughly 2 stops of light.  Does this still happen with speedboosters? 

It wouldn't be called a Speedbooster if it did now would it.

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2 months 1 week ago #669062 by effron
Copied and pasted from a seller......
If a lens intended for 35mm film or similarly sized full-frame camera sensors is connected to a camera with a Micro Four Thirds-sized sensor, it would project an image larger than the Micro Four Thirds sensor was built to accept. Able to capture only the center portion of the projected image, the effective angle of view of the lens would be narrowed, creating an in-camera "crop factor." The T Speed Booster ULTRA 0.71x adapter condenses the light from a lens designed for 35mm film or "full-frame" camera sensors and projects it onto a Micro Four Thirds sensor. This allows the Blackmagic Pocket Cinema Camera 4K with a Micro Four Thirds sensor to utilize more of the light gathered by a connected lens, which effectively reduces the crop factor while making available to the sensor an additional 1-stop of light for each of the lens's f/stop settings.

Why so serious?
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2 months 1 week ago #669109 by KENT MELTON

Shadowfixer1 wrote:

Colorado Mike wrote: I've been seeing more and more talks about Speedboosters as of late.  Are these things basically a teleconveter inversed acting as an optical magnifier?  That's all these things are right?  But teleconverters will cost you stops of light 2x teleconverter will cost you roughly 2 stops of light.  Does this still happen with speedboosters? 

It wouldn't be called a Speedbooster if it did now would it.


Ha!  I was going to say the same.  You took my thunder. ha ha ha


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2 months 1 week ago #669186 by fmw
Every digital camera has a "speed booster."  We call it the ISO adjustment and it allows the camera to amplify the sensor's ability to process the light.  If you use a 2X converter (not recommended) you will need to raise the ISO in order to get the same exposure you would get without it.


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2 months 1 week ago #669236 by Kenta
These make crop sensor cameras like full frames.  


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