Pentax lens repairs?
Posted 03/09/2014 - 16:09
Link
How bad is the scratch? If it's only minor, the chances are it will have no effect on image quality. It could create a little flare if the light hits at a particular angle.
Even deep scratches can be dealt with, by carefully filling with black paint. Providing we don't go too far with this, the technique has been used over decades and it prevents the flare problem. As we are not focusing on the surface of the front element we can't see the defect.
Even deep scratches can be dealt with, by carefully filling with black paint. Providing we don't go too far with this, the technique has been used over decades and it prevents the flare problem. As we are not focusing on the surface of the front element we can't see the defect.
Best regards, John
Posted 03/09/2014 - 17:28
Link
Lots of little scratches John, I'll clean it up and post a pic in a while. Basically the tripod tipped over and it fell face down onto a stone beach. It's still usable but there are definite artefacts visible on images.
Posted 03/09/2014 - 17:41
Link
The scratch on the left is the worst one, more of a chip out of the glass. Many of the others are not really more than marks on the coating.
Posted 03/09/2014 - 18:01 - Helpful Comment
Link
Always use a lens hood and that will avoid most damage. The coating marks just might polish out. In extremis I use some lens fluid, very sparingly.
I would try the cleaning route first and then see if the images are affected. If not, then replacing a front element might be quite an expensive job. JPS could guide you best on that.
I would try the cleaning route first and then see if the images are affected. If not, then replacing a front element might be quite an expensive job. JPS could guide you best on that.
Best regards, John
Posted 03/09/2014 - 19:07 - Helpful Comment
Link
You might get away with it. The best thing to do is make sure
it's as clean as possible. About the best lens cleaner you can
get is ROR available from many sources, but the distributor
seems the cheapest and they are an excellent professional firm
to deal with.
http://www.newprouk.co.uk/ROR-lens-cleaner.html
I regret not buying some double (back to back) K lens caps
from them when they had them in stock. They let you store
two lenses together. I suppose I could try glue
--
it's as clean as possible. About the best lens cleaner you can
get is ROR available from many sources, but the distributor
seems the cheapest and they are an excellent professional firm
to deal with.
http://www.newprouk.co.uk/ROR-lens-cleaner.html
I regret not buying some double (back to back) K lens caps
from them when they had them in stock. They let you store
two lenses together. I suppose I could try glue
--
Half Man... Half Pentax ... Half Cucumber
Pentax K-1 + K-5 and some other stuff
Algi
Pentax K-1 + K-5 and some other stuff
Algi
Posted 03/09/2014 - 22:24
Link
Thanks for the link Algernon, I've ordered some of that, even if it doesn't work in this case it's useful to have.
Posted 03/09/2014 - 22:26
Link
johnriley wrote:
Always use a lens hood and that will avoid most damage.
Of course it was in my bag not on the lens. Actually it's the second time I've tipped my camera over on that beach, I should learn.
Always use a lens hood and that will avoid most damage.
Posted 04/09/2014 - 10:33 - Helpful Comment
Link
I recently sent two of my lenses to JPS for repair, firstly I got them to quote for the repair, then sent the quotes to my insurer, (Aviva) who by the way were absolutely brilliant!!
All sorted by JPS the only thing was the length of time it took to get the spares and repair them, otherwise the resulting lenses are excellent!
If you're worried about it get it sorted...
Regards
Andy
All sorted by JPS the only thing was the length of time it took to get the spares and repair them, otherwise the resulting lenses are excellent!
If you're worried about it get it sorted...
Regards
Andy
A few bits & Bobs
Posted 05/09/2014 - 10:59
Link
The NewPro cleaner arrived very quickly but didn't make any improvement, highlighted the problem bits more though!
Got a completely unhelpful generic reply from JPS saying send it in and we'll check but it will cost you £24 if you refuse the repair. A nice reply from Alan Marlow, he's on holiday but will get me a price as soon as he gets back. I think I know who'll be getting the work based on that.
Got a completely unhelpful generic reply from JPS saying send it in and we'll check but it will cost you £24 if you refuse the repair. A nice reply from Alan Marlow, he's on holiday but will get me a price as soon as he gets back. I think I know who'll be getting the work based on that.
Posted 05/09/2014 - 18:25
Link
Asahi accepted my DA*16-50 for repair, though based on my experience so far I rather wish they hadn't. It needed a new SDM motor. I finally collected it today, after a seven month wait, only to find that it is no better than it was before - it still focuses slowly and quite often will not lock focus at all. I will have to take it back for him to have another look at it when he returns from holiday. So it's back to the trusty Sigma 17-70 for the time being.
Regards, Philip
Posted 05/09/2014 - 18:35 - Helpful Comment
Link
Ouch I feel your pain I dropped my sigma 100-300mm f4 and chipped the front element and smashed the second element grrrr.
Alan Marlowe I can recommend and asahi photo although they can be a bit bit and miss on the parts.
Alan Marlowe I can recommend and asahi photo although they can be a bit bit and miss on the parts.
PPG Wedding photography Flickr
Concert photography
Currently on a Pentax hiatus until an FF Pentax is released
Concert photography
Currently on a Pentax hiatus until an FF Pentax is released
Add Comment
To leave a comment - Log in to Pentax User or create a new account.
289 posts
15 years
Scotland