Has anyone directly compared the subject eyepieces? Should I try to find an older 11 or go for the new Type 6? TIA for any advice! - Chuck
How Does the Nagler 11mm T6 Compare to the Old Typ
Started by TheDesertSage, 03/04/2006 04:46AM
Posted 03/04/2006 04:46AM
Opening Post
Posted 03/06/2006 06:24AM
#1
Chuck Burton said:
Has anyone directly compared the subject eyepieces? Should I try to find an older 11 or go for the new Type 6? TIA for any advice! - Chuck
Hi Chuck,
I have both eyepieces. As indicated by others, the earlier version has a little more light throughput but less contrast. I have indirectly compared several of the original T1 versions to the newer T6 and Generally find the original T1s have slightly more light transmission. That said, the detail is good, they're sharp and crisp, but when reviewing notes and comparing sketches I've noticed I consistently show more contrast and 'definition' through the T6s. There are exceptions and it depends on the object being viewed.
On brighter planetary objects and lunar images, the T1s appear to provide slightly less detail and definitely have lower contrast. I'll let Pete, Floyd, and the others debate the reasons. These are just some things I've noticed correlating my EP comparison testing notes. To some extent it also seems to depend on the optics used. An example is the original 4.8mm versus the smooth side 4.8mm versus the newer 5mm T6. In my BT-125 HFT telebinos the original 4.8mm (w/ring - See picture) appears to provide the best viewing in all but Lunar observing. On the other hand, using the NP-127, the 5mm T6 seems to provide better overall viewing most of the time. Except for the 4.8mm & 5mm I haven't done an intentional direct comparison of the other T1s vs T6s. The comments are just things I've noticed and made a note in the margin that some day I should go back and do direct comparisons between the original 7mm, 9mm, 11mm, and 20mm Naglers versus the current manufacture.
Hope this helps. Clear Skies, Bill
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