Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Pentax Lenses

Reply
 
Thread Tools Search this Thread
Old Apr 8, 2010, 10:38 PM   #31
Senior Member
 
NMRecording's Avatar
 
Join Date: Feb 2010
Location: Eastern Appalachains
Posts: 866
Default

And yes, a good tripod - the one that will last a long time and do the job right - is expensive. Cheap ones end up costing you more in the long run - when you discover the cheapy isn't steady enough, when the slightly more expensive one breaks, when you find the next one, a sturdy but heavy one, gathering dust because it's too heavy to carry far, then you'll realize you'd save money by buying a good one in the beginning.[/QUOTE]



This made me laugh. I've bot two tripods now and hate them. I went back to using the one that was given to me 6 years ago, a nice Bogen. I like it except its ability to rotate the camera 90 degrees. Nothings perfect and my money is limited.
NMRecording is offline   Reply With Quote
Old Apr 8, 2010, 10:42 PM   #32
Senior Member
 
shoturtle's Avatar
 
Join Date: Dec 2009
Location: Frankfurt AM
Posts: 11,348
Default

JC,

I second that in getting a good tripod. Bogen are nice, so or sliks and cullmann's and will not break the bank like the bogen. Get one that can be a gounder also.
__________________
Super Frequent Flyer, no joke. Ex Patriot and loving it.
Canon Eos 60D, T1i/500D, Eos1, Eos 630, Olympus EPL-1, and a part time Pentax K-X shooter.

Last edited by shoturtle; Apr 8, 2010 at 11:23 PM.
shoturtle is offline   Reply With Quote
Old Apr 9, 2010, 4:23 AM   #33
Senior Member
 
jachol's Avatar
 
Join Date: Aug 2006
Location: NW. England
Posts: 1,201
Default

Quote:
Originally Posted by JC de Jonge View Post
I do have some lcd cleaning cloths.. I think I can use those also. When the aperture is set to 22 the blades open up very smooth en fast, though I don't have experience, I believe that should be ok. Also I don't see any scratches whatsoever so that's nice. However I do believe there is some dust within the lens...that isn't really harmful is it?

Thanks again for your replies
Carlo,
Some dust within a lens is inevitable over time, especially a zoom lens, since as it extends and retracts it has to allow some ingress of air into the interior else it wouldnt be able to function, minor amounts of dust shouldn't affect picture quality to any great degree.
jachol is offline   Reply With Quote
Old Apr 9, 2010, 4:05 PM   #34
Senior Member
 
mtngal's Avatar
 
Join Date: Nov 2005
Location: Frazier Park, CA
Posts: 16,056
Default

A little dust isn't a big deal normally. Just make sure it is dust and not fungus, which is a problem. I've had no experience with fungus so I'm not a good one to answer the question "how do you tell what is a bit of dust and what's the start of fungus".
mtngal is offline   Reply With Quote
Old Apr 11, 2010, 8:16 AM   #35
Senior Member
 
Join Date: Mar 2010
Location: Holland
Posts: 105
Default

There are just some minuscule spots within the lens so I believe it's only dust. btw the pictures I take with the lens seem very clear so that's ok I guess. I ordered a lens pen to clean up my lenses, I read they are quite functional and do the job they're supposed to.
Today I played around with another lens I got with the package, the Panagor 80-200 1:3.8 which I believe also goes under the name Krion 80-200 f4 (yes I know the aperture differ but the f4 was tested to be able to do 3.8 also) and it gives nice results. I also tried it in combination with the teleconverter and I was able to make some nice macro pictures with more freedom because of the dof. Would it be better to use extension rings/tubes with the lens or just the teleconverter?
One final question The other lens I got with the package (a Beroflex 300 1:5.6) has some smudges on the rear lens glass, however it is on the other side of the glass (inside the lens) som I'm not able to clean it. Or there any options e.g. open op the lens or something to clean it?
(edit) I made up my mind about the tripod, I will be going for the Cullmann Nanomax 260.. I believe it's the most versatile and best build tripods in that price range.
__________________
Pentax K-x, DAL 18-55, Tamron 70-300, Sigma 10-20
JC de Jonge is offline   Reply With Quote
Old Apr 11, 2010, 4:54 PM   #36
Senior Member
 
mtngal's Avatar
 
Join Date: Nov 2005
Location: Frazier Park, CA
Posts: 16,056
Default

As far as what to use with what - try it all and see what results you get with all combinations. The only combination I haven't tried is my macro lens with the 50mm reversed and the extension tube - figure I have virtually no space between the front element and the subject with the lens reversed, adding the extension tube would make it impractical. Otherwise, I've used the extension tube with various lenses, tried the lens reversed with a couple of different lenses etc. It's fun to experiment and you'll get a much better idea of what does what.

There are ways to open up and clean lenses - I've just never tried it. Some lenses are harder than others. Do the smudges affect quality? I wouldn't worry about a couple of miniscule spots of dust, especially if it doesn't make a difference with quality. Roy, who's been ill, once posted pictures taken with a 300 mm lens that looked like someone cleaned it with a brick - the front element was horribly scratched. He took some really outstanding pictures with it.
mtngal is offline   Reply With Quote
Old Apr 11, 2010, 6:15 PM   #37
Senior Member
 
Join Date: Mar 2010
Location: Holland
Posts: 105
Default

Indeed it's a lot of fun to try it all out
UNfortunately the smudges affect quality very badly... it is like there is some sort of fog on the pictures... maybe I'll just try to open up the lens (it's more or less given to me for free so I don;t really mind) any ways to do this?
__________________
Pentax K-x, DAL 18-55, Tamron 70-300, Sigma 10-20
JC de Jonge is offline   Reply With Quote
Old Apr 11, 2010, 9:26 PM   #38
Senior Member
 
VTphotog's Avatar
 
Join Date: Mar 2005
Location: Extreme Northeastern Vermont, USA
Posts: 4,234
Default

K-mount lenses have a number of springs behind the electrical contacts, which are easily lost, as are the little balls which make the contacts. The iris also has a return spring.
How the lens is disassembled depends on who made it, and when. Older lenses will almost always require a specialized lens wrench. Some newer ones can be disassembled with screwdrivers. If you are very mechanically inclined, and don't think you have anything to lose, it may be worthwhile.

brian
VTphotog is offline   Reply With Quote
Old Apr 12, 2010, 5:45 AM   #39
Senior Member
 
Join Date: Mar 2010
Location: Holland
Posts: 105
Default

I managed to get the dirty glass out, it seemed there was some kind of extension tube at the beginning of the lens which was easily screwed off after dismounting the tripod mount..
However the glass seems to have some limestone so now I let some chemicals work on it.. and hopefully the glass will be clean again.
__________________
Pentax K-x, DAL 18-55, Tamron 70-300, Sigma 10-20
JC de Jonge is offline   Reply With Quote
Old Apr 12, 2010, 7:38 AM   #40
Senior Member
 
Join Date: Mar 2010
Location: Holland
Posts: 105
Default

Even though the smudges seem to persist, the picture quality seems to have improved anyway.
The first picture is before cleaning, the second after cleaning
(don't mind the pictures on itself.. the focus is a bit off etc )
Attached Images
  
__________________
Pentax K-x, DAL 18-55, Tamron 70-300, Sigma 10-20

Last edited by JC de Jonge; Apr 12, 2010 at 7:43 AM.
JC de Jonge is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 4:45 PM.