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Go Back   Olympus UK E-System User Group > Cameras, lenses and system accessories > Lens focus > Converters, adapters and extension tubes

Converters, adapters and extension tubes All those lens accessories that get in between the lens and the camera.

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  #16  
Old 15th August 2009
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Re: 4/3 adapters auto or manual

Hi Peter

This is probably because the 500mm mirror lens is a fixed aperture, usually f8.
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  #17  
Old 15th August 2009
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Re: 4/3 adapters auto or manual

Again correct, both of my Vivitar Macros? are F2.8 and if I use A (aperture) mode the display on the E-1 shows this figure no matter what aperture you set on the lens F dial. I also use the histogram to judge exposure all the time and if I have time I will alter the aperture on the camera as per the programing sequence on the dandelion chip instructions.


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  #18  
Old 15th August 2009
gno
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Re: 4/3 adapters auto or manual

Thanks to everyone who has contributed to this node so far.

So from what I have read and understood.

It does not seem to be worth paying the price for the Olympus MMF-1 OM 4/3 adapter at around £160.

Cheap OM adaptors are available on the likes of ebay for between £8 - £15 these seem to work very well, but with legacy lenses all settings are made manually. These cheaper adaptors do not have an in focus confirmation.

If you want to have “in focus confirmation” again after using manual settings you can buy a slightly more expensive chipped adaptor for around £20 +

Couple of further questions

Is there a preferred seller of the el cheapo adaptor and likewise the chipped version.
Does there seem to be much difference in the quality of the adaptors themselves, I see some are quoted as being made of brass, while others appear to have a chrome finish, I could image that if the machining is not spot on damage could easily be done to the camera mount.

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Gavin
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  #19  
Old 15th August 2009
Archphoto
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Re: 4/3 adapters auto or manual

Musicman: Both the E410 and the E520 show -.- for aperture when mounted a lens with the Olympus (non-chiped) OM to 4/3 adapter.
There is no diference between the 1.8/50mm and the 8/500mm.

Peter
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  #20  
Old 15th August 2009
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Re: 4/3 adapters auto or manual

Quote:
Originally Posted by Archphoto View Post
Musicman: Both the E410 and the E520 show -.- for aperture when mounted a lens with the Olympus (non-chiped) OM to 4/3 adapter.
Same with E-1 and E-3.

Steve
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  #21  
Old 7th June 2010
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Re: 4/3 adapters auto or manual

Yep, mine does too. I have just bought a cheap 3/4rds to legacy adapter and it meters perfectly with my recently aquired 50mm f1.8. I have some hit and miss shots with focusing issues, I think that's just me forgetting how to focus manually!
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  #22  
Old 7th June 2010
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Re: 4/3 adapters auto or manual

I use (on E520 & E30 with OM50 f1.8 & OM28 f2.8 lenses) the plain OM generic Chinese made adapter & the same with an AF confirm chip in it which I got from http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=120544941377 & I use Ap Priority (Manual is OK too with metering) ignoring the specified f number (it's only there for EXIF data record) as the meter still works generally fine, although + or - exp might still be needed. In S-AF mode the shutter button can be held half way while manually focusing the lens & the appropriate focus point will light & when in focus will give you the beep (if turned on). By holding the shutter button fully, the shutter won't fire till focus is confirmed anyhow. To over-ride that, select maual focus on the camera.

The following Dandelion brand appears to be the same chip & is programmable as I got the maximum (unrealistic) focal length by accident when playing around in Manual Mode. Check it out. http://oly43club.ru/forum/index.php?showtopic=351

Cheers,
Ross
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  #23  
Old 8th June 2010
Toonman
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Re: 4/3 adapters auto or manual

Thanks Ross.

Any idea of hte size of lens cap and rear cap for the 50mm F1.8?

Cheers

Adam
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  #24  
Old 8th June 2010
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Re: 4/3 adapters auto or manual

Quote:
Originally Posted by Toonman View Post
Thanks Ross.

Any idea of hte size of lens cap and rear cap for the 50mm F1.8?

Cheers

Adam
The lens cap/filter size is 49mm, but I prefer to use a 49-58mm stepup ring using the standard 58mm size cap. The rear cap can be a 4/3's (especially if the adapter is on) or a pentax for the OM (may need small mod).

Ross
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Flickr: https://www.flickr.com/photos/ross-the-fiddler/
Cameras: OM-D E-M1 & Mk II, Olympus Stylus 1, OM-D E-M5.
Lenses: M.ZD12-40mm f2.8 PRO Lens, M.ZD40-150mm f2.8 PRO Lens with MC-14, M.ZD12-50, M.ZD60 Macro, M.ZD75-300 Mk II, MMF-3, ZD14-54 II, Sigma 150mm F2.8 APO Macro DG HSM.
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  #25  
Old 8th June 2010
Toonman
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Re: 4/3 adapters auto or manual

Thanks Ross
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