|
I have had good and bad experiences with Alibaba sellers, and some mainland Chinese sellers are very slow to deliver. Be aware of the February shutdown of business in China due to their new year holiday period, which affects some businesses for two weeks.
I used to buy Canon DSLR parts on a regular basis and woukd say 70% took about six weeks min to receive.
For something like an astro filter, i would stick to the respected brands with a history. There is a supplier in Hong Kong, Cyclops Optics, which i have purchased from - bought a cheap set of Optolong RBG filters (low cost Chinese brand). They are ok -just. I would not buy their narrowband filters however. You could look at ZWOs filters but i believe they are identical and from the same source supplier as the Optolongs. Both ZWO and Cyclops are Alibaba sellers. The Baaders and Astronomiks etc give you very precise specs, excellent multicoating, etc. I use Baaders for narrowband, purchased from Teleskop-Express, no regrets.
|