Search results for 'sensor cleaning' - page 125

Best Focal Length for Portraits?

28mm f2

Weirdly I've been thinking the same thing about the 28/3.5 I have. It goes to infinity very rapidly and is more or less focus free for larger subjects. I am seriously considering saving for a K-x as they seem to be coming down in price, the video mode and higher resolution sensor appeal.

Which 18-200/250 ?

After getting dust on my sensor after having my KX for about a month and changing the lens about 3 times I'm thinking about getting a 18-200/250 to save me changing lens ! Which is the best one ? thanks

Which 18-200/250 ?

Lens changes don't necessarily have to cause dust problems. There's a trick to it which the manual doesn't include: Find reasonably dust-free area Turn camera off Hold camera facing downwards Have new lens ready with rear cap removed Rapidly unclip lens and fit new lens Replace rear cap on o...

what macro lens??

Gasp! Forget the 1.7TC, that's a telephoto instrument, not a macro tool. (unless intending to remove the glass, just to gain the not-necessary AF coupling ability for use as an extension tube, but that would be heresy - unless the TC is optically crap and already worthless as a TC.) That's not true,...

smc lens cleaning service

Anyone know where I can get an SMC 50mm lens cleaned in the UK (ie the series preceding the SMC-M) and what sort of cost I'm looking at? Does anyone here offer that? Many thanks

smc lens cleaning service

Try Alan at http://www.cam-rep.co.uk/ He is in Shepperton so you could drop it into him. Has cleaned/fixed a number of my "K" and M series lenses.

smc lens cleaning service

Thanks Peter, appreciated

smc lens cleaning service

I have used him before and he did a good job at a decent price. Last time I emailed him (a few weeks ago) he was very busy and was talking of a 2 week + turnaround.

Extension tubes with a Macro or ..................

Extension tubes do not affect the focal length of the lens. Their job is to increase the distance between the lens & film/sensor, which reduces the lens-subject distance at focus & so increases the magnification. Not clearly explained but perhaps enough to help! :D Mike

M 50mm 1.7 Fungi???

Dead easy to fix, the M 50mm is probably the best lens to learn repairs on as it's very simple. You are likely to need the following: A lens spanner (basically two metal prongs mounted on a bar which can be adjusted for different diameter lenses) Something to unscrew the finishing ring (the bi...

M 50mm 1.7 Fungi???

Matt. Thanks for your time and info. tempted to have a go. Which unscrews first and which way? It cost me just £5, so no problems. I mostly felt sorry for the charity shop. I have two A versions, so I don't need it for myself. Perhaps someone more capable that me would like to have a go at...

M 50mm 1.7 Fungi???

For future reference, the finishing ring and the front element group both screw into the filter thread (which extends further into the lens barrel than you can see with the lens assembled). The finishing ring acts as a locknut to keep the front group from unscrewing itself. I've rescued three 50s...

Fun with Fungus.!

With the bayonet mount removed, we can now simply unscrew the rear group assembly by hand... Again, anti-clockwise. Here are the two rear elements seperated Ideally, the rear element should be removed from it's housing, but the retaining ring was very tight and I could not undo it. Not r...

Fun with Fungus.!

You don't actually need to remove the filter threaded part or indeed the bayonet mount - the element groups will unscrew anyway. Be careful using washing up liquid as some of them include additives designed to make glasses shine - great for impressing the mother in law at xmas dinner but not suc...

Fun with Fungus.!

When I mentioned to mowog that I would like to know how he managed the cleaning operation, I certainly did not expect such a comprehensive response. I am facinated by the proceedure, beyond my shaky hands. Thanks mowog. You have given me, and many others an insight to how a lens is constructed an...

Fun with Fungus.!

Thanks, persons all. DM. You need not remove the mount or the filter tube, if you have a lens spanner. I am too mean to buy one (good ones are expensive!), so it is necessary to remove those parts, in order to get the access and grip needed for removing the element retaining rings. The method of...

18-135mm DA WR

It's cheating though and degrade the IQ, I don't like it I don't agree that anything in digital photography is cheating - to cheat you have to deliberately break rules for your advantage. Not sure that applies at all. As regards a loss in quality, if there is one I can't spot it with images side ...

18-135mm DA WR

Well over-thinking it is good, it keeps you sharp :wink: The problem lies that the corrected photo and the non corrected photo holds the same information because it's the same photo, only the corrected one is a bit stretched in certain ways. In a simpler explained way you're suggesting to comp...

1959 Pentax Auto-Takumar 55mm f/2 -v- Pentax 'A' 50mm f/1.7

Just a quick test taken on a tripod 1.250M from the banknotes to sensor/film plane K20D 100ISO 45 deg Flash 1/100th sec. f/5.6 Centre of frame only.(quite a large area). Camera square and level with CL of target. 1959 Pentax Auto-Takumar 55mm f/2 -v- Pentax 'A' 50mm f/1.7 One of the last mad...