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Forum: Pentax K-30 & K-50 09-24-2015, 02:24 AM  
Is the K-50 a worthy upgrade for the K-r?
Posted By jmclaugh
Replies: 14
Views: 2,463
If you want a new one and your top budget is £350 then the K50 is your only option, the cheapest K50 body I've seen in the UK is £329, you'll need £399 for a KS1 body, KS2 and K3 are even more.
Forum: Film SLRs and Compact Film Cameras 09-22-2015, 07:29 AM  
MX shutter dial... am I doing it right?
Posted By jmclaugh
Replies: 7
Views: 1,739
It is a bit stiff but I can adjust it with my index finger while looking through the viewfinder. (ooh err missus)
Forum: Film SLRs and Compact Film Cameras 09-22-2015, 07:13 AM  
Hypothetical - If Pentax brought out a 35mm film SLR today...
Posted By jmclaugh
Replies: 194
Views: 15,367
Nope, I have a thirty something MX that is still going strong.
Forum: Pentax K-30 & K-50 09-18-2015, 09:46 AM  
which of the Pentax bayonet mount lenses fit the K 50?
Posted By jmclaugh
Replies: 28
Views: 5,041
Just to finish the story a nice bloke at a camera shop was happy to try the lens for me, it fitted and worked fine. So now I know the Vivitars work ok I'll be going with a Pentax DSLR. Options look to be a new K500 + 18-55 at £289, new K50 + 18-55 at £350 though the shop have a used K30 +18-55 in good nick at £200.
Forum: Pentax News and Rumors 09-18-2015, 05:44 AM  
Pentax FF spring 2016
Posted By jmclaugh
Replies: 967
Views: 113,142
Having taken this long for Pentax to produce a FF DSLR I guess it is better to delay release and get it right for both the pro and the very enthusiastic amateur markets.

Anyway for your average photographer on a budget FF DSLRs are not going to feature on their radar until the prices come down a fair bit more bearing in mind you also need to buy new lenses. Currently I think the lowest price for a new FF DSLR body in the UK is around £800 and that's with 24 or 20 megapixels.
Forum: Visitors' Center 09-18-2015, 04:28 AM  
Old Pentax MX SLR camera
Posted By jmclaugh
Replies: 6
Views: 1,581
Sorry, yes that explains it better as the image sensor is smaller than a 35mm negative area. It explains why DSLRs often come with a 18-55 lens as this gives about the same field of view as a 28-85 lens on a 35mm film camera.
Forum: Visitors' Center 09-18-2015, 03:57 AM  
Old Pentax MX SLR camera
Posted By jmclaugh
Replies: 6
Views: 1,581
I also have an MX and was wondering the very same thing about using lens for it on a Pentax DSLR. I took a lens to a camera shop and tried it, it worked fine and as you're used to a totally manual camera like the MX it works the same way on a DSLR. One thing to bear in mind is unless the DSLR is full frame the focal lenght of the lens when used on a DSLR will be the same as if you have a 1.5x teleconverter mounted. e.g. a 50mm lens becomes a 75mm lens.
Forum: Pentax K-30 & K-50 09-16-2015, 09:14 AM  
which of the Pentax bayonet mount lenses fit the K 50?
Posted By jmclaugh
Replies: 28
Views: 5,041
No wish to damage a mount and if the guy in camera shop says no or yes it will damage it so he won't try that's fine.

The 3 lenses are Vivitar PK mount late 1970s glass and metal construction; 135mm 2.5 Auto Telephoto, 28mm 2.8 Auto Wide-Angle, 35mm 2.5 Auto Wide-Angle. The mounts look exactly like the mount on a Pentax SMC-M 50mm 1.7 lens except the base lens element is in a casing that sits higher that the base of mount so while the guard looks higher on the Vivitar mount I suspect it is actually the same size but I'm not sure. A couple of quickly taken pics are attached, the first is the SMC mount, the second is the Vivitar.
Forum: Pentax K-30 & K-50 09-16-2015, 02:48 AM  
which of the Pentax bayonet mount lenses fit the K 50?
Posted By jmclaugh
Replies: 28
Views: 5,041
Thanks for that. I'm going to take one of the VIvitar lenses to a camera shop and hopefully they'll let me try it on say a K50 body. If they don't fit I'll probably opt to remove the guard.

One thing I hadn't realised is using these lenses on a non-full frame DSLR is like having 1.5x teleconverter on it. In a nutshell that means I do need something like an 18-55mm lens for wide angle use or some prime lenses but the latter would get pretty expensive and defeats the idea of using my existing lenses. Still I guess the SMC 50mm 1.7 will become a very nice portrait lens and the 135mm 2.5 will become a fast 200mm telephoto lens,
Forum: Pentax K-30 & K-50 09-14-2015, 10:05 AM  
which of the Pentax bayonet mount lenses fit the K 50?
Posted By jmclaugh
Replies: 28
Views: 5,041
Many thanks mholford and vonBolony for the kind replies. So it is the apeture guard depth that is the issue, I've just checked my SMC 55mm lens to the Vivitar ones and the latter do seem to have a guard which is a tad longer. Sounds like the best course of action is to try one out so maybe a visit to a camera shop is the best idea to see if they fit a DSLR properly.

I googled "ricoh pin" and it seems such lenses are marked "KR" and all my Vivitar lenses are marked PK and have no such pin so I don't think I will have that problem. There is some stuff here if anyone is interested about it and how to fix it if you have that problem.

theatre of noise: Ricoh Lenses On Pentax Cameras -- The Ricoh Pin Fix

As for a K50 or K500 body it seems the latter is unavailable in the UK and I can only find it with an 18-55mm lens which I don't really need. Perhaps it has discontinued. It seems the only difference between them is the K50 is weather resistant and displays what area of the picture the autofocus has used which is obviously irrelevant for a manual focus lens. Any thoughts on the two much appreciated.
Forum: Pentax K-30 & K-50 09-14-2015, 07:04 AM  
which of the Pentax bayonet mount lenses fit the K 50?
Posted By jmclaugh
Replies: 28
Views: 5,041
P.S. Can't seem to edit that post well not yet anyway and I forgot to ask ano question. So while I remember when using an old K bayonet mount lens can you manually set the shutter speed and the aperture and the camera light metering system tells if it is ok or not as per full manual operation or do you have to set the aperture and leave shutter speed selection to the camera?
Forum: Pentax K-30 & K-50 09-14-2015, 06:49 AM  
which of the Pentax bayonet mount lenses fit the K 50?
Posted By jmclaugh
Replies: 28
Views: 5,041
Hi,

I found this forum when looking into the use of old K bayonet lenses on new Pentax DSLRs so I joined. Anyway I still have an old Pentax MX and the following lenses; SMC 50mm 1.7, Vivitar 28mm 2.8, 35mm 2.5 135mm 2.5 all late 1970s vintage that started out life on a K1000. As I need a new camera I thought I'd look into just getting a new Pentax DSLR body and use the lenses. I've seen the info on here which all seems pretty straightforward other than the bit about conductive. https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html
and I also came across this video which indicates you also need to specify the focal length.















You Tube




Firstly I'm hoping someone could clarify if the Vivitar lenses will work? I've examined the mounts and they look identical to the Pentax SMC mount so I'm hoping there isn't a conductive issue.

Secondly can anyone confirm if the focal length must be entered as per that video as that sounds a real pain each time you switch lenses? (It doesn't make sense why the camera needs to know that and I don't see how that works with a zoom lens so I'm thinking there must be some other reason like shake reduction?)

As for the camera I'm thinking of a K500 or K50.
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