Minolta SR lens to Olympus OM ( film ) body adapter ?

[neilt3]

I've done several searches with no luck .

I'm after putting a Minolta SR mount ( aka MD or MC manual focus era lens ) bellows lens on the Olympus OM ( film era , not 4/3 or M4/3 ) mount telescopic extension tube .

The whole lot will then mount on a digital camera with an adapter I already have .

.

The reason why I want an SR to OM. Adapter is because I have a Minolta bellows lens as well as several Olympus OM bellows lenses .

I have bellows for both systems , and fixed extension tubes etc , but when I'm out on the road touring in my campervan I want to minimise the kit I take with me .

Having just one set off bellows ( or the telescopic tube ) out with me will make this easy .

And an adapter is better than replacing the Minolta lens with an Olympus one ( who don't do a 100mm bellows lens .

.

So does anyone know if one was or is made , if so where ?

A ready made one would be a better option than having one made .

Thanks .

 

[neilt3]

Or possibly a Nikon F lens to Olympus OM (film) body .

As I have a Minolta SR to Nikon F adapter , and I don't mind stacking .

 

[Nigel Ish]

You probably want some sort of universal bellows with swappable mounts to use your bellows lenses.

 

[neilt3]

You probably want some sort of universal bellows with swappable mounts to use your bellows lenses.

I do have an AICO autobellows that has interchangable mounts , but it's specifically the Olympus telescopic extension tube that I want to use as when it's not in use it's takes up not much more space than a 50mm lens , so it's dead handy to fit in a camera bag or pocket .

Likewise I have compact folding bellows that Minolta made that folds down to about 2 1/2" square by about 1" thick .

It's framework folds in on itself so it fits in a pocket . Which is also fine , though I would need an Olympus OM lens to Minolta SR adapter to use the Olympus lenses on that .

Either way is workable , but when I'm on the road I don't want to be taking a traditional bellows unit .

Cheers .

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[Eggplantt]

You might be best off getting a set of Minolta MD extension tubes, often vintage, which are threaded on the rear, and hope it's a usable filter thread/something you can get a step ring made for:

Then attach to an Olympus OM reversing ring.

I have a set of Konica AR tubes like this, also vintage.

 

[Eggplantt]

On a little further investigation, it turns out they do make those modern, cheapo threaded extension tubes for Minolta MD mount too:

Pixco Macro Extension Tube For Minolta MD/MC Camera Specs are based on 50mm f1.4 lens

£6.23/8.38USD. Same as before, use the threaded side to connect to an OM reversing ring, step ring might be required. As reversing rings are 'male' by default, the inner threads of a step-down ring would probably have to be used.

 

[neilt3]

You might be best off getting a set of Minolta MD extension tubes, often vintage, which are threaded on the rear, and hope it's a usable filter thread/something you can get a step ring made for:

Then attach to an Olympus OM reversing ring.

I have a set of Konica AR tubes like this, also vintage.

That's probably a workable solution .

If I haven't already got an OM reverse ring ( I might well have in one of box of bits !) There about £30 .

I've a few sets of early SR extension tubes , I think one of them might be the type that screw together . If not I can probably pick one up for less than £10.

Joining the two might need a stack of 49mm filters with the glass removed to extend the Reverse rings thread and expoxy into the tubes , as there both male threads .

Or SRB might do a double female thread adapter .

I'll hang on to see if anyone's already heard of a ready made adapter before I make my own .

Thanks for the suggestion .

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[Eggplantt]

You might be best off getting a set of Minolta MD extension tubes, often vintage, which are threaded on the rear, and hope it's a usable filter thread/something you can get a step ring made for:

Then attach to an Olympus OM reversing ring.

I have a set of Konica AR tubes like this, also vintage.

That's probably a workable solution .

If I haven't already got an OM reverse ring ( I might well have in one of box of bits !) There about £30 .

It is surprising that I couldn't find one on aliexpress, some old listings that are no longer sold. Nevertheless, I found a couple of eBay listings for a period correct 49mm reverse ring, roughly same total cost but one with 'free' postage:

Around £13/$17.48 USD.

https://www.ebay.co.uk/itm/114737148021

https://www.ebay.co.uk/itm/114736829430

I've a few sets of early SR extension tubes , I think one of them might be the type that screw together . If not I can probably pick one up for less than £10.

Joining the two might need a stack of 49mm filters with the glass removed to extend the Reverse rings thread and expoxy into the tubes , as there both male threads .

Or SRB might do a double female thread adapter .

I'll hang on to see if anyone's already heard of a ready made adapter before I make my own .

No need to pop glass from a filter, you can join 'male' threads together with a common step down ring. That is, one which steps down to the thread you're working with, e.g. 62-58mm, because when you're going to the next one down it will usually have a constant inner thread. Like so:

Problem- two 'male' 58mm threads. EOS reversing ring.

Solution- 62-58mm step down ring.

closeup of 'constant inner thread' of step down ring

You probably already have this to hand.

 

[neilt3]

It is surprising that I couldn't find one on aliexpress, some old listings that are no longer sold. Nevertheless, I found a couple of eBay listings for a period correct 49mm reverse ring, roughly same total cost but one with 'free' postage:

Around £13/$17.48 USD.

https://www.ebay.co.uk/itm/114737148021

https://www.ebay.co.uk/itm/114736829430

The type you show has a locating pin socket to lock it onto the camera .

With the manual focus OM cameras the locking pin is built into the lens , this type shown in the picture is the type used on the later autofocus SLR's , such as the OM 101 .

Either they've used a generic stock photo in their listing or they have listed it wrong .

The type of revering ring needed is the more expensive one like this ; https://www.ebay.co.uk/itm/291706238104?hash=item43eb0bf498:g:ocIAAOSwh-1W4sRe

Notice the push in tab towards the bottom .

I've ordered one of these so I should have it in a few days .

I've a few sets of early SR extension tubes , I think one of them might be the type that screw together . If not I can probably pick one up for less than £10.

I had a look at the extension tubes I already have .

All my genuine Minolta ones are all bayonet fit, auto aperture type .

I did have one of those cheapo type ones , but the thread is an odd size , about 57.5mm or something .

So I've ordered up one of the Minolta AT-5 , it's listed as an "Automatic Extension Tube Set" , but as it looks like a screw together type design , I can't see it myself .

Makes no difference as it'll typically be adapted to another system anyway .

Joining the two might need a stack of 49mm filters with the glass removed to extend the Reverse rings thread and expoxy into the tubes , as there both male threads .

Or SRB might do a double female thread adapter .

I'll hang on to see if anyone's already heard of a ready made adapter before I make my own .

No need to pop glass from a filter, you can join 'male' threads together with a common step down ring. That is, one which steps down to the thread you're working with, e.g. 62-58mm, because when you're going to the next one down it will usually have a constant inner thread. Like so:

closeup of 'constant inner thread' of step down ring

You probably already have this to hand.

I have got a load of step up and step down rings , so if the Minolta tubes do have a standard filter thread sized thread , it'll straightforward to fit .

If not I'll soon bond some together .

Thanks again for the suggestions .

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[Lightshow]

Since the mount registration of the OM is longer than SR, which makes infinity impossible without adding extra optics, there was/is very little demand for such an adapter.

You are heading the direction I'd recommend, a little ingenuity, a wheelbarrow full of determination, and a dash of luck, and you should be able to cobble together a useful solution.

If you can't find a one-off part, RAF Camera may be able to help you out like they helped me out. http://forum.mflenses.com/help-with-bellows-modification-t78913.html

 

[Eggplantt]

It is surprising that I couldn't find one on aliexpress, some old listings that are no longer sold. Nevertheless, I found a couple of eBay listings for a period correct 49mm reverse ring, roughly same total cost but one with 'free' postage:

Around £13/$17.48 USD.

https://www.ebay.co.uk/itm/114737148021

https://www.ebay.co.uk/itm/114736829430

The type you show has a locating pin socket to lock it onto the camera .

With the manual focus OM cameras the locking pin is built into the lens , this type shown in the picture is the type used on the later autofocus SLR's , such as the OM 101 .

Either they've used a generic stock photo in their listing or they have listed it wrong .

The type of revering ring needed is the more expensive one like this ; https://www.ebay.co.uk/itm/291706238104?hash=item43eb0bf498:g:ocIAAOSwh-1W4sRe

Notice the push in tab towards the bottom .

I've ordered one of these so I should have it in a few days .

Oh, that's really quite strange. You're right, it is built into the lens from what I can see on my OM adapters. In the description they emphasise compatability with OM-1/OM-2 so not sure what's going on.

 

[neilt3]

Since the mount registration of the OM is longer than SR, which makes infinity impossible without adding extra optics, there was/is very little demand for such an adapter.

You are heading the direction I'd recommend, a little ingenuity, a wheelbarrow full of determination, and a dash of luck, and you should be able to cobble together a useful solution.

If you can't find a one-off part, RAF Camera may be able to help you out like they helped me out. http://forum.mflenses.com/help-with-bellows-modification-t78913.html

I've had a few things from RAF camera , I've to order an oddball adapter from him soon once I've checked the tread for a Copal 3s mount I have to hold a standard lens filter .

The shutters an old one and uses a finer thread than the modern versions .

 

[neilt3]

It is surprising that I couldn't find one on aliexpress, some old listings that are no longer sold. Nevertheless, I found a couple of eBay listings for a period correct 49mm reverse ring, roughly same total cost but one with 'free' postage:

Around £13/$17.48 USD.

https://www.ebay.co.uk/itm/114737148021

https://www.ebay.co.uk/itm/114736829430

The type you show has a locating pin socket to lock it onto the camera .

With the manual focus OM cameras the locking pin is built into the lens , this type shown in the picture is the type used on the later autofocus SLR's , such as the OM 101 .

Either they've used a generic stock photo in their listing or they have listed it wrong .

The type of revering ring needed is the more expensive one like this ; https://www.ebay.co.uk/itm/291706238104?hash=item43eb0bf498:g:ocIAAOSwh-1W4sRe

Notice the push in tab towards the bottom .

I've ordered one of these so I should have it in a few days .

Oh, that's really quite strange. You're right, it is built into the lens from what I can see on my OM adapters. In the description they emphasise compatability with OM-1/OM-2 so not sure what's going on.

It's more likely they've messed up the description , rather than listing it with the wrong picture .

Doesn't inspire me with confidence to deal with them !

Anyhow , everything I've ordered should be with me by the end of the week along with an automatic focus stacking rail that does steps from 1 micron upwards .

So as soon as I can adapt one thread to another of the reverse mount and extension tube , I'll be good to go .