DPReview.com is closing April 10th - Find out more

It’s like they trying to wipe the M6ii off the earth Locked

Started 4 months ago | Discussions thread
This thread is locked.
nnowak Veteran Member • Posts: 9,074
Re: It’s like they trying to wipe the M6ii off the earth

m100 wrote:

nnowak wrote:

m100 wrote:

nnowak wrote:

m100 wrote:

nnowak wrote:

The 100mm f/2.8 is too short and/or too slow for my needs.

Speed Booster ?

I wonder if it would still auto focus so crazy good ?

https://www.bhphotovideo.com/c/product/1479471-REG/metabones_mbspef_efm_bt1_canon_ef_to_eos.html/compatibility?ap=y&ap=y&smp=y&smp=y&lsft=BI%3A514

I am well aware of the Speedboosters. I was converting Sony E mount Speedboosters to EF-M mount years before Metabones decided to release their own EF-M mount version.

No, a 71mm f/2.0 would not be any more useful for my needs than a 100mm f/2.8. Though the soon to be launched Viltrox 75mm f/1.2 has piqued my interest.

how did you come up with 71 ?

https://www.bhphotovideo.com/c/product/1479471-REG/metabones_mbspef_efm_bt1_canon_ef_to_eos.html/qa?ap=y&ap=y&smp=y&smp=y&lsft=BI%3A514

The answer is right there in the name of the speedbooster in your link. The Metabones has a 0.71X factor. 100mm X 0.71 = 71mm. Some of the other lower cost Chinese speedboosters are 0.73X.

After years of work with speedboosters, I have abandoned them altogether as they have too many compromises and are no longer truly useful. Speedboosters made sense in the early days of mirrorless when lens lineups were extremely limited and full frame mirrorless did not even exist. That is no longer the case. Adapting the old full frame lens to a full frame body, or using dedicated crop mirrorless lenses, will always outperform speedboosting a full frame lens on a crop body.

i see, you and Larry are talking about something else.

I was thinking what the lens becomes with the speed booster on it.

With the speed booster mounted on the lens instead of looking like a 160mm FF lens it will look like a 113mm FF lens ?

A 113mm lens on full frame.  The basic idea of a speedbooster is to make the adapted full frame lens on a crop sensor produce an image that is roughly equivalent that same bare lens on a full frame camera.

Post (hide subjects) Posted by
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
KEG
MAC
MAC
MAC
MAC
MOD RLBur
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow