Sigma macros lens on Nikon D5300

Marabak

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Hi. I'm not sure if this is the appropriate subcategory for this question.

Inspired by this weeks edition of Amateur Photography magazine and its array of articles on second-hand gear, I was impulsed to purchase a Sigma 28mm f2.8 Mini Wide II macro lens for not much money on a famous internet auction site. I don't know why, but something made me think it was a M42 lens or something (I am new to photography, and very new to third party lens).

However, on closer inspection, the seller did mention that "This was being used on a Praktica B200 35mm film camera (also being sold, see other listings). The B200 camera body has a bayonet mount (44.4mm bearing diameter, 48 mm ID) according to the manual. A Praktica web site on google says Praktica-B-mount with EDC (electronic diaphragm control). I don't know which other cameras it will fit."

I can wait until the lens arrives (hopefully in the next few days) to clarify any more details, plus take some photos of the lens itself, but I was wondering if anyone had any advice on a suitable adapter to allow me to use this lens on my current Nikon D5300. If anyone knows of an adaptor that will work, I can order it now so that it turns up not long after the lens. I have googled for bayonet B mounts and variations of to now avail up to yet, but I am sure there must be something out there.

I am aware that autofocus etc. probably won't work, which is fine, as currently I manual focus when taking attempted close-up/macro-style images anyway and I intend to continue to do so.

Thank you.
 
Solution
The flange distance of the Praktica B mount is 2.5mm shorter than Nikon F, meaning that the Praktica lenses sit that much closer to the film plane (or in the case of your Nikon, the sensor) than the Nikon mount would allow them to be, so you're unlikely to find an adapter that will let you mount that lens onto your Nikon camera. Even if you did, it wouldn't allow you to focus to infinity, which might actually not be an issue if you're only going to use the lens for close-ups, or it would use some kind of corrective glass element that would allow you to focus on distant objects but would also negatively affect the image quality.
The flange distance of the Praktica B mount is 2.5mm shorter than Nikon F, meaning that the Praktica lenses sit that much closer to the film plane (or in the case of your Nikon, the sensor) than the Nikon mount would allow them to be, so you're unlikely to find an adapter that will let you mount that lens onto your Nikon camera. Even if you did, it wouldn't allow you to focus to infinity, which might actually not be an issue if you're only going to use the lens for close-ups, or it would use some kind of corrective glass element that would allow you to focus on distant objects but would also negatively affect the image quality.
 
Solution
The flange distance of the Praktica B mount is 2.5mm shorter than Nikon F, meaning that the Praktica lenses sit that much closer to the film plane (or in the case of your Nikon, the sensor) than the Nikon mount would allow them to be, so you're unlikely to find an adapter that will let you mount that lens onto your Nikon camera. Even if you did, it wouldn't allow you to focus to infinity, which might actually not be an issue if you're only going to use the lens for close-ups, or it would use some kind of corrective glass element that would allow you to focus on distant objects but would also negatively affect the image quality.
 

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