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Forum: Pentax Q 6 Days Ago  
Now you can order a Metabones K to Q Speedbooster!
Posted By vonBaloney
Replies: 62
Views: 3,423
Ok, to be clear the metabones device for Pentax K to Q (that doesn't exist) is in-fact a focal reducer -- same thing as a "telecompressor" I guess. But it shouldn't vignette as I noted because these are lenses for a bigger format -- that's the whole thing that allows it to work.
Forum: Pentax Q 6 Days Ago  
Now you can order a Metabones K to Q Speedbooster!
Posted By vonBaloney
Replies: 62
Views: 3,423
Oh, *that* adapter, not *this* adapter...ok.
Forum: Pentax Q 6 Days Ago  
Now you can order a Metabones K to Q Speedbooster!
Posted By vonBaloney
Replies: 62
Views: 3,423
Isn't it though? It's a focal reducer -- that's the way it gets it "speed boost", right? And you won't get vignetting because they are K lenses using the tiny Q sensor so there is plenty of leeway there.
Forum: Pentax Q 07-12-2020, 05:03 PM  
Now you can order a Metabones K to Q Speedbooster!
Posted By vonBaloney
Replies: 62
Views: 3,423
Don't we spend more on lenses than cameras? Doesn't the metabones allow us to use all those lenses? It is a bargain for some...
Forum: Pentax Q 06-10-2020, 08:25 PM  
Now you can order a Metabones K to Q Speedbooster!
Posted By vonBaloney
Replies: 62
Views: 3,423
Would not trust this listing.
Forum: Pentax Q 05-15-2020, 11:06 AM  
Q used prices
Posted By vonBaloney
Replies: 6
Views: 783
I did buy an extra one when I had the chance...
Forum: Pentax SLR Lens Discussion 03-17-2020, 06:45 AM  
Preventing M42 adapter light leaks and dust ingress - an easy solution!
Posted By vonBaloney
Replies: 40
Views: 11,919
Good lenses. I think my solution for those is above in this thread somewhere (which only involves popping on a big rubber washer).
Forum: General Photography 03-08-2020, 10:35 AM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
Forum: General Photography 03-08-2020, 09:07 AM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
Yes, medical error deaths get funneled into the things they "actually" die of, i.e. doctor causes heart attack: they died of "heart disease" on the death cert. And so heart disease stats are inflated, which affects flows of research money. It's a huge problem.
Forum: Pentax KP 03-07-2020, 03:08 PM  
Vintage lenses fouling KP mirror
Posted By vonBaloney
Replies: 21
Views: 1,154
I have a tele-xenar 135/3.5 -- it doesn't protrude much, can't imagine it being a problem. Will have to test that one. One thing about m42s is that they are sometimes used-adjusted to change infinity settings when people adapt them to things they don't adapt well too -- is it possible to adjust a lens so it protrudes farther than it once did?
Forum: Pentax KP 03-06-2020, 05:23 PM  
Vintage lenses fouling KP mirror
Posted By vonBaloney
Replies: 21
Views: 1,154
The K-01 has a low overhang where the mirror would flip-up/focusing screen area would be, and the DX/1.7 just crushes into that if you start focusing toward infinity (assuming it was away from infinity when you mounted it) and so you could do some real damage that way...
Forum: General Photography 03-06-2020, 05:08 PM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
Because they don't think they'll be able (or will be afraid) to go to the grocery store at all soon, so they need everything. And they might be right...
Forum: Pentax KP 03-06-2020, 04:02 PM  
Vintage lenses fouling KP mirror
Posted By vonBaloney
Replies: 21
Views: 1,154
It doesn't work on the K-01, that's what I remember. I can try it again just to make sure I'm not making things up.

The Mamiyas some of them you have to file down the aperture ring to mount it, but I haven't any infinity mirror-fouling problems. But I haven't used them much -- my copies had tended to have Schneideritis and have a hotspot when stopped down.
Forum: Pentax KP 03-06-2020, 03:38 PM  
Vintage lenses fouling KP mirror
Posted By vonBaloney
Replies: 21
Views: 1,154
The SX, meaning the Mayima? From what I remember, the Yashinon-DX 50/1.7 is the absolute worst lens ever as far as hitting mirrors -- even the DX/1.4 I think is ok (don't quote me on that). And probably the others you mention unless you've found out differently. (And I've got copies of all of those, don't think I've had that particular trouble with any of them.) There are are couple of others known for hitting mirrors on full-frame that I can't recall right now, but I don't think they were all in the same family or even necessarily adaptable to Pentax (Canon lenses, etc). As far as APS-C, the Yash DX/1.7 is the only one that comes to mind.

BTW, the later Yash DS-M 1.4 & 1.7 50s are totally fine in that regard and even better optically, although not as cool-looking...
Forum: Pentax KP 03-06-2020, 03:30 PM  
Vintage lenses fouling KP mirror
Posted By vonBaloney
Replies: 21
Views: 1,154
Now that I think about it I think my memory is failing me whether I actually had trouble with it or not. (Not eager to go test that) However, that lens is definitely a problem with full-frame cameras besides the original one it was meant for -- I believe later model Yashinon film bodies even had a warning about using it. I think what it was is that some people were having trouble with it on Pentax APS-C bodies (at infinity) and some weren't. Probably specific to your copy of the lens. And I do recall thinking "Ok, well it should be fine on my K-01 with no mirror" and then finding out it wasn't because the "mirror box" wasn't big enough and it would just bang into the edge. So maybe the issue is not only that it protrudes quite far, but also that the part that is protruding is of usually wide diameter?
Forum: Pentax KP 03-06-2020, 03:18 PM  
Vintage lenses fouling KP mirror
Posted By vonBaloney
Replies: 21
Views: 1,154
The Yashinon DX 1.7 is known for that -- don't try to put it on a K-01 either even though it has no mirror. I'm not sure it is fine on the K3 either (it is not fine on the K-5) -- I doubt it is at infinity.
Forum: General Photography 03-01-2020, 12:05 PM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
The consensus is still that it was the bubonic plague, but some don't agree.
Forum: General Photography 03-01-2020, 09:48 AM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
Now you are mixing up numbers. It would be 20x at most, and a rate closer to 1% is more likely, so maybe 10x-12x for USA assuming people can get treatment (at the same level they would if they had the flu), etc...
Forum: General Photography 03-01-2020, 09:12 AM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
Ok, typo with my percentages and decimals. Looking up the numbers again now I see different ones listed in different places so I guess I won't trust any of them presently, and we'll just see how it goes as trends emerge...
Forum: General Photography 03-01-2020, 08:31 AM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
I'd don't know where 10-40x comes from -- the numbers so far indicate 4x (2% compared to 0.05%), but most recent indications are that it will likely settle at about a 1% fatality rate, so that would be twice as deadly. Risk is significantly higher for old or compromised people (as usual) -- it does not seem to be much of risk at all to children so far. This type of virus that is less deadly and has longer incubation period is actually what will allow it to spread so successfully compared to the avian flu where you got sick and died very quickly -- that actually makes it much easier to contain.
Forum: General Photography 02-29-2020, 03:34 PM  
Corona virus prevention on cameras and lenses
Posted By vonBaloney
Replies: 209
Views: 9,652
This virus very probably will not pass, and probably at least 50% of those reading this will get it at some point (and you'll also mostly likely be fine and maybe not even notice). It will be a new seasonal virus. The chance for containment has already failed. The initial go-around will not be great for those that are most vulnerable, after that some built-up immunity in the community will be present and vaccines will be hopefully available. Hopefully we won't destroy our society in a crazy panic about it though. America is particularly vulnerable among advanced nations but I'd have to weigh into political territory to tell you why...
Forum: Digital Processing, Software, and Printing 02-17-2020, 08:43 PM  
Adobe DNG Converter v12.2 install fails on Win 10
Posted By vonBaloney
Replies: 8
Views: 722
I didn't download until I read your thread today, and it was no trouble.
Forum: Digital Processing, Software, and Printing 02-17-2020, 03:05 PM  
Adobe DNG Converter v12.2 install fails on Win 10
Posted By vonBaloney
Replies: 8
Views: 722
I just gave it a try, it installed fine. Maybe your virus program doesn't like it? Conflict with earlier version? Or you just need to reboot and try again maybe...
Forum: Troubleshooting and Beginner Help 02-15-2020, 12:07 PM  
K10D Books?
Posted By vonBaloney
Replies: 9
Views: 495
The magic lantern book for the k10D is very good
Forum: Site Suggestions and Help 02-11-2020, 09:53 AM  
Suggestion Marketplace manners and protocol
Posted By vonBaloney
Replies: 19
Views: 978
I have had (mostly) nothing but good experiences buying and selling here, btw. But I do self-filter sellers I find questionable or unknown for bigger ticket items. (If you experienced sketchy behavior from people with good feedback and significant track records I'd be surprised.) And as a seller, I have waved off buyers before. But that was because they were being sketchy or I was going to be put at additional risk -- I'd never just sell to someone else mid-transaction or raise a price.
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