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Legacy Lenses Discuss the use of older lenses, using adapters, from the Olympus OM system, Leica M and R-series, and the millions of others too.

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Old 17th February 2016
wasted spark wasted spark is offline
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OM 300mm f/4.5

Hi all. A bit new around here but this already looks like a great resource.

I'm a new owner of an E-M5ii and I have a lovely collection of OM gear and I'm keen to do a little experimenting. I'm still waiting for an OM/m43 adaptor to arrive but once it does, I'm quite keen to try out some super telephoto moon shots.

I have a few lenses that offer some potential for this but the stand out candidate seems to be the 300mm 4.5.

Has anybody used this for moon shots? It's going to give me 600mm equivalent out the box but I also have an MC-14 1.4x TC so I could get up to 840mm equivalent with that pair but that isn't going to fill the frame so I'm pondering a cheap OM 2x as well. That's not exactly going to let much light in but will be pretty close to filling the frame I think. Am I mad?

One worry is that I don't have a tripod collar for the 300mm. Quite concerned about hanging all of the weight of the camera so may need to address that first.
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Old 17th February 2016
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Re: OM 300mm f/4.5

I've tried it with my 300 on my E-520 and the results weren't great - I'd anticipate it would be easier to focus with the newer camera though. I was also hand holding (resting on a cushion or similar, while shooting out of an open window, if I recall correctly) so using a tripod would be helpful.

Don't just focus to infinity on the lens - I think you'll actually need to magnify the view on the screen and check the focus.

I've seen plenty of good moon shots on here before, though, so I'm sure someone else can give some better advice than me...

Mike
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Old 17th February 2016
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Re: OM 300mm f/4.5

Hi there Wastedspark!

I would be tempted to see how well you get on with the OM 300 / f4.5 with the MC-14 and use the digital teleconverter on the EM-5ii to get the frame filled. I get the feeling that because you are only using the centre portion of the image circle of the OM 300 that by adding stacked teleconverters all you would be achieving is spreading the light out further across the sensor - you would not get any greater detail because the OM lens wouldn't resolve more. With the Digital teleconverter you wouldn't loose any light and therefore wouldn't have to increase the iso to compensate causing image degradation due to noise reduction.

The biggest issues I find with the E-M1 and 500mm mirror that I use are normally atmospheric distortion due to me being only a couple of hundred yards from the river Mersey, with the resulting heat and moisture in the atmosphere causing the image to be blurry.

Here's a recent photo taken with this combo (some clarity and sharpening added during processing from RAW)



Cheers,

Ralph.
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Old 17th February 2016
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Re: OM 300mm f/4.5

Stability is very important, but a couple of bits of wood and some padding to protect the lens and a very simple stand can be made to put the camera on.

I think this was done with a 600mm Sigma so giving 1200mm eqv..



Yes it is a composite
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Old 17th February 2016
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Re: OM 300mm f/4.5

Thanks chaps. This is great food for thought.

Dying for this adaptor to turn up. I'm sure when it does, we'll have nothing but cloud for several weeks!
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Old 17th February 2016
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Re: OM 300mm f/4.5

Should have mentioned that I also have an OM 200mm f/4. Possibly another option though I would have though the 300mm will work better.
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Old 17th February 2016
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Re: OM 300mm f/4.5

Getting very long shots, with old glass, can be quite fun:



Please keep in mind that this is taken through dirty double glassing on a dull rainy day



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Old 18th February 2016
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Re: OM 300mm f/4.5

You may well find that the MC-14 converter won't fit on the adapter. It has an extra lug on the lens-side mount that prevents it fitting onto any lens not designed for it - currently only the 40-150 f/2.8 and the as yet unavailable 300mm f/4. Although as others have pointed out you may be better off using the lens without and just cropping (or using the "digital teleconverter" option).

Good luck with it.

John
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Old 18th February 2016
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Re: OM 300mm f/4.5

Quote:
Originally Posted by Bikie John View Post
You may well find that the MC-14 converter won't fit on the adapter. It has an extra lug on the lens-side mount that prevents it fitting onto any lens not designed for it - currently only the 40-150 f/2.8 and the as yet unavailable 300mm f/4. Although as others have pointed out you may be better off using the lens without and just cropping (or using the "digital teleconverter" option).

Good luck with it.

John
The solution to that is cut the extra lug off.

I've had the OM 300 for years but don't think I ever photographed the moon with it.
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Old 18th February 2016
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Re: OM 300mm f/4.5

Quote:
Originally Posted by David M View Post
The solution to that is cut the extra lug off.
That could have a distrastrous effect to the MC-14's resale value
I supect that the MC-14 design is carefully matched to the position of the rear elements in it's target lenses - so even minus the lug it most likely wouldn't be usable with the OM-300.
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Old 18th February 2016
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Re: OM 300mm f/4.5

Quote:
Originally Posted by Gwyver View Post
That could have a distrastrous effect to the MC-14's resale value
I supect that the MC-14 design is carefully matched to the position of the rear elements in it's target lenses - so even minus the lug it most likely wouldn't be usable with the OM-300.
It's just a tool, what does the resale value matter. I took a hacksaw to the tripod mount of my OM 300 to make clearance for a blimp a year or so after I got it.
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Old 19th February 2016
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Re: OM 300mm f/4.5

EM-1 300 4.5 with Oly x2 converter. Aircraft at 38,000 feet



Hand-held with x2 converter

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Old 19th February 2016
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Re: OM 300mm f/4.5

Quote:
Originally Posted by Glenn S View Post
EM-1 300 4.5 with Oly x2 converter. Aircraft at 38,000 feet



Hand-held with x2 converter

This looks very promising! Nice work. Is your's the Olympus OM 2x or a third party one? Do you find the need to stop down a little or fine wide open?
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Old 19th February 2016
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Re: OM 300mm f/4.5

Quote:
Originally Posted by wasted spark View Post
This looks very promising! Nice work. Is your's the Olympus OM 2x or a third party one? Do you find the need to stop down a little or fine wide open?
Thanks. It's the Olympus 2X-A converter and I usually stop down a couple of stops.
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Old 19th February 2016
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Re: OM 300mm f/4.5

Quote:
Originally Posted by Glenn S View Post
Thanks. It's the Olympus 2X-A converter and I usually stop down a couple of stops.
Great. Thank you.
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