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If the Pentax XW 30mm & 40mm came back, would you buy?....

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#176 25585

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Posted 07 October 2019 - 02:19 PM

The eyepiece that gave me the most blackouts was the Explore Sci 40/68°. With an eye relief of 31mm, holding the exit pupil was very difficult, and eye placement was very finicky. Just too much of a good thing.. twitch.gif

Diameter aside, SWA 40mms were fine there with a screw-up cup. I will buy an XW 40 first, the 30 if its OK.


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#177 junomike

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Posted 11 October 2019 - 07:04 PM

I hate to say it, but I've seen some fairly bad blackouts with some Tele Vue eyepieces.  Among the worst I've experienced were with Radians.  But let's not open that can of worms.

 

Mike

Comparing apples to apples I found the 31T5 and 41 Pan to be better for blackouts than the 30/40 XW's.


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#178 Sarkikos

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Posted 11 October 2019 - 07:35 PM

I'm OK with the 31T5 and 41 Pan.  I really don't experience blackouts with them.  I've never owned or used a 30 or 40 XW, so I don't know how they are.  But I didn't have blackouts at all with the other XW's I owned.  (I had all the others except the 14mm.)

 

Mike


Edited by Sarkikos, 11 October 2019 - 07:36 PM.


#179 csrlice12

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Posted 11 October 2019 - 07:50 PM

I've not experienced blackouts with the 30 or 40 XWs, but I have the eye cup up a bit.


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#180 areyoukiddingme

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Posted 12 October 2019 - 01:28 AM

I found the XWs are very sensitive to eye placement. Once you get used to them and get the cups dialed into the right position, they are a piece of cake. The 30 and 40 are just as easy and comfortable as any of the 1.25" for me.

 

If you aren't used to the XWs, and you try using when the cups are too low, you'll probably get blackouts until you get the distance figured out (just a few minutes of messing about).



#181 csrlice12

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Posted 12 October 2019 - 11:34 AM

Yea, its just that when I see someone complain about blackouts with XWs, it never fails that they haven't adjusted the eyecup... foreheadslap.gif


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#182 Sarkikos

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Posted 12 October 2019 - 12:50 PM

I keep the eyecup all the way down on all my eyepieces so I can keep my eyeglasses on while viewing.  I never experienced blackouts with my XW's.  Never.  I would just look in the XW and pretty much immediately my eye came to the right position for comfortable viewing.  XW's are probably some of the easiest eyepieces for eye placement available today.  Much easier for eye placement than, say, the Radians.  In my experience, Radians were Blackout City.

 

Mike


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