Lens Dew Protection
Posted 07/08/2012 - 10:19
Link
Perhaps a fan (heated if possible would work).
Have a look what's available for CCTV cameras
Have a look what's available for CCTV cameras
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 07/08/2012 - 13:49
Link
You could try looking up trace heating tape - an industrial way of preventing pipes freezing. Snag is I've only ever come acros 110v/240v versions and I guess you'd be limited(for safety/convenience) to battery power.
If you're OK with a soldering iron you could make a 'ladder' with say 20 off 1k resistors across two copper conductors. This would disipate about 6Watts on a 12 v battery (might be enought) Then all you need to do is find a way of insulating the 'ladder' in such a way so that you can wrap it around your lens.
regards
Bernard.
Alternative is don't go out at night
If you're OK with a soldering iron you could make a 'ladder' with say 20 off 1k resistors across two copper conductors. This would disipate about 6Watts on a 12 v battery (might be enought) Then all you need to do is find a way of insulating the 'ladder' in such a way so that you can wrap it around your lens.
regards
Bernard.
Alternative is don't go out at night
Posted 07/08/2012 - 15:27
Link
One option could be a Dew Shield. They are designed for telescopes, but depending on the lens you are using you may be able to get one to fit.
Bodies: K5IIs, K7, MZ5n, LX, MV
Lenses: DA*16-50, DA18-55WR, DA18-135, DAL35, M50 F2, A50 f1.4, FA50 f1.4, DA*50-135, DA55-300, Tamron 70-300, DFA 100 WR Macro, M135 f3.5, Sigma 120-400 APO DG HSM, Tokina 500 f8.0
Flash: Metz 58, Metz 48
Accessories: BG4, Pentax right angle finder, Pentax mirror adaptor lens, O-ME53 Viewfinder Loupe
Auto 110 System: Auto 110, Winder, 18mm, 24mm, 50mm, 70mm, 20-40mm, AF100P, 1.7x telecon
Lenses: DA*16-50, DA18-55WR, DA18-135, DAL35, M50 F2, A50 f1.4, FA50 f1.4, DA*50-135, DA55-300, Tamron 70-300, DFA 100 WR Macro, M135 f3.5, Sigma 120-400 APO DG HSM, Tokina 500 f8.0
Flash: Metz 58, Metz 48
Accessories: BG4, Pentax right angle finder, Pentax mirror adaptor lens, O-ME53 Viewfinder Loupe
Auto 110 System: Auto 110, Winder, 18mm, 24mm, 50mm, 70mm, 20-40mm, AF100P, 1.7x telecon
Posted 08/08/2012 - 09:34
Link
You can make a basic but reasonably effective dew shield with a piece of black card and some selotape. Even better is the black foam sheets you bet in craft shops. It's a high density soft foam about 2mm thick. It comes in the same sizes as card/paper. A4, A3 etc
Another option is a small 12v travel hairdryer and one of those Car starter contraptions which is basically a 12 battery in a plastic case with sensible connectors. ( like this)
A quick blast when it starts fogging up and you're back in business.
Another option is a small 12v travel hairdryer and one of those Car starter contraptions which is basically a 12 battery in a plastic case with sensible connectors. ( like this)
A quick blast when it starts fogging up and you're back in business.
.........all the gear, no idea!
Me super, MX, LX, K5,DA 18-55WR, DA 17-70, DA 55-300, DA40 Ltd, FA50 1.4, Samsung D-Xenon 12-24,Samsung 100mm macro M50 1.7(x3), M28 3.5, M35 2.8, M100macro f4, M135 3.5(+others)
Me super, MX, LX, K5,DA 18-55WR, DA 17-70, DA 55-300, DA40 Ltd, FA50 1.4, Samsung D-Xenon 12-24,Samsung 100mm macro M50 1.7(x3), M28 3.5, M35 2.8, M100macro f4, M135 3.5(+others)
Posted 07/09/2012 - 08:59
Link
Thanks for your time and replies folks. I am going to try MarkD's option first. Will let you know how I get on.
Cheers
DaveH
Cheers
DaveH
DaveH64
Add Comment
To leave a comment - Log in to Pentax User or create a new account.
2 posts
16 years
Scotland
With Aurora activity going to increase over the next year and my attempts at trying to catch meteors on long night shoots I have a continuing problem with dew forming on the lens.
Does any have any solutions for use with dslr's with dew straps, Heaters or dew protection lens attachments. Would be interested to here as it gets frustrating.
Cheers
Dave