Has anybody tried the filter? What is your opinion?
https://www.youtube.com/watch?v=3f2YZ2jwYnU
Regards,
Mariusz
https://www.youtube.com/watch?v=3f2YZ2jwYnU
Regards,
Mariusz
If you really need the protection (for seawatching?) then I don't think the filter would noticeably degrade the image. However, it's not a very good idea of Kowa (or Swarovski) to put the filter thread in the objective hood instead of the scope body.
John
Does this mean on an 883/Swaro that if you extend the hood the filter moves away from the objective lens?
Same with ATX/STX, unfortunately. The threads are on the hood only and hence next to useless. I guess this is Swarovski's and Kowa's educational approach to keep us away from evil, image-degrading UV filters.
Kowa got it right on the 774 - the filter screws on to the body of the scope and the hood slides out over it.
https://www.birdforum.net/showpost.php?p=3725586&postcount=4@dogbreath I cannot open the link you sent.
@dogbreath
I cannot open the link you sent.
https://www.birdforum.net/showpost.php?p=3725586&postcount=4
I think Kowa and Swarovski are wrong in placing the filter thread on the hood:
1) The further the filter is away from the lens he worser for ghosting and flare.
2) The hood cannot shade the filter against sunlight, hence unnecessary reflexes appear.
3) The hood cannot protect the filter against water spray, branches, finger tips etc.
But I doubt that they took proper filter use on their scopes into consideration. A Swarovski rep told me: "The front lens coating is hard as well as water and dirt repellent. You don't need a protective filter, not on the sea, not elsewhere, it would degrade the image only. The front thread is there for the lens cap solely."
Maybe, but I'd like to make my own decisions. In the end, it is *my* scope.
I am much more comfortable cleaning a secondhand filter than the front element of my scope and if the filter gets damaged it is cheaper and easier to replace thana flourite front element.
I leave my filter on my 823 all of the time. I notice a slight image degradation when using my 50x eyepiece, in which case if the weather's ok I temporarily remove it. With the 30x, for seawtaching etc., the difference is barely noticeable, so I tend to leave it on as default. Mine is also a Hoya.
Filters are a bother, especially in cold and damp conditions. Moisture condensing on the filter inside gradually blurs things.
A good hood normally protects more effectively, without impacting the view.