For collimation and info go here .
How will you know.
If there out a long way you'll know when you look .
If there only slightly out it can bring on head acks from eyestain.
Try to relax your eyes before looking because the mind will compensate and merge the images if there slightly out.
When you relax you eyes when you first look you will see the images not merged but after a short while they may come together.
http://www.oberwerk.com/support/collimate.htm
http://www.binocularschina.com/binoc...inoculars.html
http://www.oberwerk.com/support/coll100.htm
The latter is the manufacturer of all these.
I have the 80mm Triplets and they needed collimation from new.
I have read this is common with all these Chinese bino's.
Most probably why they are so easy to collimate.
I also have an older pair of Celestron 80mm (Re Vixen Japanese made Circa 1990's) and the quality difference is quite obvious between them especially at the prisim mounts and adjustments.
In 15years I have never need to collimate the Vixens.
Don't expect to much from the Chinese units but they do offer the best bank for you buck if you don't mind re collimating them regularly.
The main problem i have found with the 80mm triplets is the front support bracket that goes around the barrels is only plastic and does bugger all as far as keeping the barrels collimated or supported.
The plastic distorts very easily and is poorly fitted at the junction.
As a result every time you adjust them in and out for inter occular eye distance adjustment they go out of collimation a little bit.
I intend to make some aluminum brackets for them instead.
The Celestron unit (Vixen ) is aluminum and hold the barrels perfectly.
I am amazed at using plastic for this as the central support tripod mounting bar is well engineered and does a good job so why use plastic for the other important part???The weight difference is small.
With the units your looking at the barrel alignment should not be a problem and the prism mounting are better designed .
As far as the optics go there very good in the 80mm triplets any.
Mainly the coatings which are first class at level 4.
Meaning all surfaces including prisms are fully multi coated.
Just be aware that some dealer sell the same Chinese binoculars with the cheaper level 1 coatings.
Andrews defiantly sells level 4.
The Chinese units look better coated than the Celestron's but then the later are 15 years old.
Surprisingly the colour correction from the triplets is about the same as the Vixen doublets but this could be a result of the Triplets being 20x and the Vixen's 11x. Same f4 focal ratios.
The interior flat paint on the Chinese unit is very poorly done and lots of shiny metal can be seen on the inside of the barrels.
This results is some reflections on brighter objects such as the moon but for deep sky does not seem to affect the image.
The Celestron's are very well done and actually have baffels in the barrels.
Any way , I am satisfied with them at only $249 as compared to the Vixens back in the late 80's to early 90's were $600+ and are still the same sorta price now.
Why did i get the 20x80's --- eye relief is important for me these days and the new units are very good in this regard. Also the 20x mag is helpful on some objects.
Hope this help a little .
I intend to do a comprehensive review after Astro Fest between the 2.
P.S. I have seen the 25x100's but have not had a close look at them so can only speculate as to the quality of construction of them .
As far as buying a Dob for the $1400 it depends what ** YOU ** want to do with them but I still enjoy just lying on my back and using Binoculars even after 35 years of telescope observing. They get used more than my scopes at time as there easy and quick to set up when you don't fell like lugging your big scope out. Also can be used for terrestrial viewing . Great for comet hunting ECT ECT.
I did see some one selling the Chinese units in Melborne for a similar price to Andrews but you will need to do a search for them.
Mark
Sorry got a bit of topic and long winded
Well i have decided to buy these industral sized binoculars, have placed my order and waiting impatiently for their arrival
u'd probably see geelong from mornington pier with those binocs! 
o.k. i'll admit it, going to use them to see where the fish are biting lol.
