Search results for 'back focus' - page 437
National Trust membership
I paid something like 25GBP (but it may have been less) back in 1974 for my life membership. Mind you that was 2 weeks wages for me then! Note to self - stick NT sticker on the car before the Scotland meet so we can visit some NT places on our trip south.
Posted by Gwyn on 21/03/2011 - 10:52
What in the world is this "thing"?
Chinese lanterns (which are banned here btw) are a single balloon with a small flame under them. They don't last very long either. That is clearly two pieces. Banned as they are the neighbours launched a few at new Year. I just hope they didn't come down on anyone's thatch. They are banned because ...
Posted by Gwyn on 21/03/2011 - 12:22
What in the world is this "thing"?
Just to put my sighting in context, comparing it to a to a 747 in the sky I would estimate it at something around 200ft tall. Chinese lantern - no. Might it be that the glare make it look bigger? And it's out of focus so the circle of confusion are larger.
Posted by Anvh on 22/03/2011 - 20:34
What in the world is this "thing"?
Since there is nothing else in the picture it is impossible to tell how big it is as you have no reference. The circle of confusion is therefore irrelevant. I used my eyes to reference the size against a known object (a 747). Welcome back Anvh :roll:
Posted by Oggy on 22/03/2011 - 20:48
What in the world is this "thing"?
Size isn't everything, how far away is the 747 and how far away is the UFO, you've no reference of depth... Since there is nothing else in the picture it is impossible to tell how big it is as you have no reference. The circle of confusion is therefore irrelevant. Not if it's glare, out of focus ...
Posted by Anvh on 22/03/2011 - 20:50
What in the world is this "thing"?
May 2009, and it's over Sussex (probably in the middle of Gatwick controlled airspace :shock:), so probably not. I'll have another go at PPing it when I get home and see if I can do a better job. Hi Oggy, I grew up in Handcross, just down the road from Gatwick. Now back in the 1970's when I was a...
Posted by mph555l on 22/03/2011 - 22:44
I am still waiting, are you?
For my cash back from the scheme that closed in January? sent my claim off in December, but nothing yet?
Posted by AndrewA on 22/03/2011 - 18:13
snail mail
Today I received a Christmas card from a friend in the UK. It was posted in back December, so it has taken over three months to reach Stockholm. Now that's what I call snail mail ! Seasonal greetings to you all ! :D /Ian
Posted by mph555l on 23/03/2011 - 07:08
snail mail
At least you still have post offices! We don't have them any more, and TNT are in the same situation with regard to private companies taking the best customers. One really weird thing is TNT don't have a contract with Royal Mail, so business post, mag subscriptions and the like all come to us via S...
Posted by Gwyn on 23/03/2011 - 10:32
Minimum membership before accessing the Classifieds?
It you restrict adverts to people with X Posts you KILL OFF ALL THE BARGAINS! :shock: There have been a few good 'bereavement sales' on here. I remember one with a great big long list of good stuff which went for reasonable prices. Sadly there will be more of these now that Pentax have a range ...
Posted by Algernon on 23/03/2011 - 18:27
Earth hour
Yes. And during it my kids plan a family game of 'Munchkin' (a wacky card game involving elves, dungeons, that kind of thing) by candle-light. So that's my Saturday night sorted out. I think I'll be reaching for the corkscrew... The mother-in-law also says she wants to do it, but is out 'line ...
Posted by Northgrain on 26/03/2011 - 17:24
Aperture
It will affect it yes. It's difficult to get all the light from a wide open to lens to focus exactly on the same place. That's why stopped down lenses tend to be sharper. This is nothing to do with DOF, but imperfections of the lens itself. With zooms it might also be a function of focal length ...
Posted by Smeggypants on 30/03/2011 - 00:14
Aperture
Yes: lenses tend to be at their sharpest (ie capable of resolving the most detail at the in-focus area) when stopped down, however this depends on the lens's maximum aperture. For example the DA 18-55 kit lens, or the Sigma 10-20, are best at about f8 while the FA43 is sharpest at f4 because it has ...
Posted by MrCynical on 30/03/2011 - 04:38
Aperture
I think it says a lot that Pentax only bothered fitting it to the Super A, of all their manual focus bodies! :lol: Weirdly it does have a use there. If you want to fiddle around proving that some DA lenses are full frame capable then shutter priority will allow you to change the aperture in a rat...
Posted by Dangermouse on 30/03/2011 - 13:15
Aperture
I also remember reading in "The Asahi Pentax Way" that when shooting at infinity with a lens with the correct markings (like the K, M or A series) you should set the infinity mark to the left hand mark for the aperture used. The theory went that otherwise you were also focusing on things beyond ...
Posted by Dangermouse on 30/03/2011 - 16:46
Copyright theft
Eventually I found a copyright infringement form on Gumtree which had to printed and faxed back (who has a fax machine these days?) and the offending advert was gone within an hour. I had to give a contact email address for the guilty party to use to contact me so I created 'robertisathievingscumba...
Posted by gartmore on 05/04/2011 - 15:29
Extention Tubes
What kind of extension tubes have you got as there are several kinds. You really want 'auto tubes' with the electrical contacts that 'talk' to the camera so you can change the aperture on your lens. If you do not have a set like that you will need a PK M or A lens (usually 28mm, 50mm or 135mm) or a...
Posted by SmutjeUK on 31/03/2011 - 10:39
Extention Tubes
Thanks guys for your comments The Tubes are not auto but they are Pentax PK in a nice leather case. I didn't realise at the time that auto versions were available [new thought - are auto bellows available? - I would prefer this option]. So in practical terms I'm back to buying another lens or a...
Posted by Frogherder on 31/03/2011 - 22:14
Extention Tubes
There are 'auto bellows' but I'm not sure if there are any with the electrical contacts. (My Panagor set being a cheap example) Auto in this case being that they pass through the aperture control levers of the M & K series lenses. With the extension tubes it might be worth considering M42 & reve...
Posted by petrochemist on 01/04/2011 - 00:00
Extention Tubes
Thanks guys, It does look as if the "right" gear is currently outside of my budget but I've have another idea ----- I have a M42 to PK adapter which I bought to enable me to use my old 500mm mirror lens on my camera (its fixed aperture and manual focus so not a lot lost there. If I take that off o...
Posted by Frogherder on 04/04/2011 - 20:49
