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  1. #1
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    Default Hard vs flexible dew shield



    what is the practical difference between these two? Ex: (https://www.optcorp.com/product.aspx...13558&kw=&st=0 and https://www.optcorp.com/product.aspx...-288-294-10798

    Is it worth extra $100.00?

    Do these shields completely solve the dew problem in places like Seattle area or you still need a dew heater?

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  2. #2
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    Default

    I'd go with the flexible one.
    Lighter, easier to store and transport, and does the same job.
    I made one for my 6SE from a plastic A2 report folder, some velcro and some stick-on felt.

  3. #3
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    Default

    The idea is to prevent dew from forming, and using Dew Heaters in conjunction with a Dew Shield would be the best defense of stopping Dew before it forms. Otherwise, you'll have to stop your viewing session and try to combat the moisture that has formed, and you DON'T want to try and wipe off your mirrors. You might damage them and ruin your scope. A few bucks spent now will save you hundreds or more later. I too live in an area that is very damp at night and Dew is a sever problem. Do yourself a favor and follow the old Boy Scout adage, 'Be Prepared', and get both. Get a Dew Shield, and Dew Heaters for your scope and eyepieces. Pay now, or pay more later.
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    Lee
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  4. #4
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    Default

    I've owned both Aluminum and flexible dew shields.. They both work exactly the same...by shielding as much of the Front glass as possible from diret contact with the moist air ... so neither has an advantage mechanically... However I would never own another Metal of solid Dew shield again...not even on my scope I use in an observatory for the reasons stated by Chappo in his reply.. ..just much harder to store then a flexible one even when it does not travel anywhere..

    Yes they work..BUT they only prolong the appearance of Dew...instead of due forming in 45 minutes you may extend the time frame before Dew forms an additional half hour or hour...that is significant...

    To prevent dew you need dew heater strips along with the shield and a controller to control the temperature of the corrector lens this combo will usually let you be dew free the entire night in most parts of the country..(in your location...I honestly do not know..

    I live in Maryland and a simple dew shield is normally all I need never even invested in dew heater strips for my CPC1100 (YET)...

    Bob G.

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  5. #5
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    Default

    I use a flexy shield and can get a few hours longer before the build up of dew. I do not use a heater either. I usually turn the scope down for a few minutes and let the dew evaporate....as well a s a hair drier...
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  6. #6
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    Default

    Here in soggy old Western New York, we tend to get really damp and foggy at night, so Dew Sheilds and Heaters are a must to prolong viewing time. You guys are lucky.
    Clear Skies!

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