Oberwerk Broadband Coatings and other Questions
Posted 27 February 2004 - 04:32 PM
Would the 20x80s give me a proportional bang-for-the-buck increase in viewing pleasure than the 15x70s? ($150 vs $230)
And finally, would these bincos be usable on a monopod?
Hey, I made it this far....down to 2 binocs!
Posted 27 February 2004 - 07:44 PM
Posted 27 February 2004 - 07:46 PM
I ask Kevin B about the benefits of broadband multi coating vs. FMC on the yahoo binoastronomy forum last year. Can't find his reply now. I recall Kevin said the improvement in transmission for each surface is only 0.5-1%. However, if you consider all 10-12 surfaces together they MAY add up to 5% improvement. I don't think you will see a difference in day light viewing at all.
I am sure you are aware of some of the shipping damages sustained by Oberwerk 20X80 S recently and will take that into consideration. Put the durability issue aside for a moment your 2nd question is easy to answer:
Go for the 20X80 instead of 15X70. Most people will want to use a mount for with 15X binos anyway. Might as well enjoy 33% higher power and 30% more light collecting area. In view of the problem reported with the 20X80 S model recently you may want to condsider the LW. This model is several inches shorter, lighter and may be a bit easier to keep in collimation. I have had my 20X80 LW for a year. They are my most used binos period. (I have ~8, can't keep track)
I can handhold the LW with my elbows braced for short viewing sessions. Use them occassionaly on a camping mattress. Don't have experience with monopods. I don't go hiking with my astro binos so if I am taking the trouble to mount them I would rather use a tripod. That way I can take my hands off to check star charts. You can't do side-by-side comparison of binos with monopods either.
I like fluid heads with Quick Release plates. I bought several spare QR plates and L tripod adapters for three of my binos. When I dismount my bino from the tripod I leave the QR plates attached. That way I can switch binos in the dark in 30 seconds. Don't have to worry about stripping 1/4-20 mounting threads either. Works for my 80mmF5 refractor too.
Posted 27 February 2004 - 09:23 PM
Is the difference between the std and the LW just weight and focal length? Will there be more CA with the LW binocs? Should I worry about it?
Thanks guys for the feedback. I'll start with a monopod and if it turns out that I want a more stable platform, I'll go for a more substantial mount.
Posted 28 February 2004 - 11:21 AM
I hope the 15x70s aren't the same. IT seems that every time I get ready to buy anything from Oberwerks...something causes me to stop.
Are the 20x90s metal or plastic? Are they stronger and better designed?
Posted 28 February 2004 - 02:57 PM
For a complete rundown on coatings see this post in the "Best Of Binoculars" thread posted at the top of the forum.
This discussion on 20 x 80 standards is taking place in two places at once. see my comments in the other thread " A little help".
These barrels are long. These could probably benefit from a bar hinge at the objective. But what affect do the long barrels have. Read my comments in this other thread.
Oberwerk 20x80 Standards
Posted 01 March 2004 - 05:28 AM
Good Luck with your selection,