QUOTE(Bartlett 914 @ Aug 13 2013, 01:47 PM)
One point was the number of photo receivers. The number helps insure fast response. My unit had 2. Better ones have more.
Not only that but having more sensors can help reduce the possibility
of being flashed when you are in odd positions, since it is less likely
that all the sensors are blocked by obstructions.
I have a Jackson NexGen EQC.
It is a great lens with a large viewing area with lots of features,
like a grind only mode,
but the battery covers are a poor design and it is easy to break them when
replacing the CR2450 coin batteries.
I like the helmut but I don't think I buy it again, there are others out there
for less money that have the same features without the battery cover issue.
My hot button features:
- switch time 1/20,000 or better
- shade control
- delay control
- sensitivity
- replaceable batteries that are easy to replace
- cheater (reading glass lens) compatible
- comfortable head gear.
Having used helmuts with large openings vs smaller ones, to me
the "extra large" viewing area is a bit over rated.
Particularly if you need to use corrective lenses.
I would spend more on other features like a faster switch time,
or a lower "light" state.
i.e. how light is the glass when not welding.
This varries a bit between different lenses.
The cheaper lenses are not as light when not welding.
That means you need more light to see prior to starting the arc.
--- bill