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Speedboster adapter ?


enny
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Can I use adapter in front of speedboster since I can’t find a specific one for my camera. I have old BMCC 2.5k m43 but can’t find specific one for my yashica mount can I just purchase EF to M43 camera mount then use EF to yashica adapter is this recommended or big NO

Thanks 

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The only reason you might not be able to is if the optics in the speed booster protrude too much and will interfere with the lenses you're planning on using.  I have a vague recollection this was the case for some of those BM-specific speed boosters, but couldn't tell you which ones.

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I have an EF to E speedbooster and an EF to E smart adapter. In turn, I have M42 to EF adapters on all my M42 lenses and OM to EF adapters on all my Zuiko lenses and they generally work fine on both. The only issues you might find would generally be with infinity focus due to slight inaccuracies in adapter depth (which can quite often be remedied by shimming with tin-foil!).

A lot of people report issues with Minolta MD/MC adapters and Canon FD adapters, but specialist ones are available.

At the end of the day, it's a case of 'order the kit from somewhere with a good returns policy and see if it works', but the chances are that it will!

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9 hours ago, enny said:

Can I use adapter in front of speedboster since I can’t find a specific one for my camera. I have old BMCC 2.5k m43 but can’t find specific one for my yashica mount can I just purchase EF to M43 camera mount then use EF to yashica adapter is this recommended or big NO

Thanks 

The Metabones micro43-EF Speedbooster product pages have info on certain types/models of manual focus lenses which are not compatible due to having rear protrusions which could damage the Speedbooster e.g.:

General m43-EF Speedboosters:

https://www.metabones.com/products/details/MB_SPEF-m43-BT3

https://www.metabones.com/products/details/MB_SPEF-M43-BT4

BM-only m43-EF Speedboosters:

https://www.metabones.com/products/details/MB_SPEF-m43-BT8

https://www.metabones.com/products/details/MB_SPEF-M43-BT9

(scroll down to the 'Manual Focus Lens Compatibility' section near the bottom of the page)

Yashica is not on the list.

  

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On 2/29/2024 at 7:21 AM, ac6000cw said:

The Metabones micro43-EF Speedbooster product pages have info on certain types/models of manual focus lenses which are not compatible due to having rear protrusions which could damage the Speedbooster e.g.:

General m43-EF Speedboosters:

https://www.metabones.com/products/details/MB_SPEF-m43-BT3

https://www.metabones.com/products/details/MB_SPEF-M43-BT4

BM-only m43-EF Speedboosters:

https://www.metabones.com/products/details/MB_SPEF-m43-BT8

https://www.metabones.com/products/details/MB_SPEF-M43-BT9

(scroll down to the 'Manual Focus Lens Compatibility' section near the bottom of the page)

Yashica is not on the list.

  

I did some digging and I found this article using xl speedboster EF to m43 with adapter

 

Here’s a 2021 Update: You don’t have to do this for modern speedboosters like ULTRA and XL, mine fitted perfectly on the viltrox EF to MFT with cheap ebay CY adapter (Except I had to turn the glass of speedbooster to fix infinity focus) but that’s a seperate issue. 

On the Metabones some lenses might scratch the velvet side only slightly so maybe if you don’t want that you can trim the pins just slightly but not the whole way using a professional or at home with metal cutting plier. 

I think author uses old gen speedboosters since it’s 2016 but I also read this post while my lens is arriving by post and I panicked a lot and this post made me panic even more having to do this to a rare lens.

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