Use your FF lens on your NEX!!!

[silvermoon1407]

But from my understanding from the whitepaper found below, the adapter act as a reducer with a factor of 0.71. I do nit think we need to add in the camera body crop factor. Correct me if I am wrong.

http://www.metabones.com/images/metabones/Speed%20Booster%20White%20Paper.pdf

No. All the numbers refered to the lens or lens/adapter combo, before applying crop factor.

E.g. look at fig 13, it shows the fov of a 35 on dx (52 equivalent) and the same lens with adapter (now 24) on m43 (48 equivalent), which explains y both fov is similar with the m43 slightly wider. The numbers without factoring crop factors will not make sense with the pictures...

 

[Prtheong]

No. All the numbers refered to the lens or lens/adapter combo, before applying crop factor.

E.g. look at fig 13, it shows the fov of a 35 on dx (52 equivalent) and the same lens with adapter (now 24) on m43 (48 equivalent), which explains y both fov is similar with the m43 slightly wider. The numbers without factoring crop factors will not make sense with the pictures...

My bad. I get what you mean. My apologies. Basically the adapter reduces the body crop factor (nex) from 1.5 to (0.71x1.5). Thanks again. Cheers.

 

[silvermoon1407]

My bad. I get what you mean. My apologies. Basically the adapter reduces the body crop factor (nex) from 1.5 to (0.71x1.5). Thanks again. Cheers.

Glad I clarified. Cheers.

 

[ricohflex]

Great, now I understand!
3) Increases MTF (or so they say)

MTF increase when additional glass element is placed in light path?

How can they claim that? May be a deceptive argument that now they are measuring MTF using different parameters. Is this a dishonest way to twist the facts and insist that black is now white.

So can I stack a 2x teleconverter on top of a 3x teleconverter on my lens and get higher MTF? Wow.

 

[Rashkae]

MTF increase when additional glass element is placed in light path?

How can they claim that? May be a deceptive argument that now they are measuring MTF using different parameters. Is this a dishonest way to twist the facts and insist that black is now white.

So can I stack a 2x teleconverter on top of a 3x teleconverter on my lens and get higher MTF? Wow.

Maybe it's the sweet spot effect.

 

[dniwkh]

MTF increase when additional glass element is placed in light path?

How can they claim that? May be a deceptive argument that now they are measuring MTF using different parameters. Is this a dishonest way to twist the facts and insist that black is now white.

So can I stack a 2x teleconverter on top of a 3x teleconverter on my lens and get higher MTF? Wow.

they probably compare the same lens on nex with and without adaptor. with adaptor you use the entire image circle so mtf probably higher

 

[Prtheong]

MTF increase when additional glass element is placed in light path?

How can they claim that? May be a deceptive argument that now they are measuring MTF using different parameters. Is this a dishonest way to twist the facts and insist that black is now white.

So can I stack a 2x teleconverter on top of a 3x teleconverter on my lens and get higher MTF? Wow.

Putting a Reducer in between the light path has the opposite effect from a teleconverter. Hence, MTF is increased. Also other optical weakness of the lens is further minimized. Please refer to the white paper. They even provide sample photo for comparison on Nikon AIS 50/1.2. Cheers.

 

[ricohflex]

Exaggerate a bit.
Say for example, to extrapolate the theory. (that 1 reducer will increase MTF)
Use 2 "reducers" or even 3 "reducers" stacked on a lens will greatly "increase" the MTF?

But with ever decreasing image circles!

I think it is a deceptive semantic trick.

Measuring MTF on a different basis or relative to a much decreased image circle. Then announcing "increased" MTF.

 

[silvermoon1407]

Exaggerate a bit.
Say for example, to extrapolate the theory. (that 1 reducer will increase MTF)
Use 2 "reducers" or even 3 "reducers" stacked on a lens will greatly "increase" the MTF?

But with ever decreasing image circles!

I think it is a deceptive semantic trick.

Measuring MTF on a different basis or relative to a much decreased image circle. Then announcing "increased" MTF.

Maybe can try stacking a few n put on a Pentax Q....