Are they collimated or are the prisms just placed in the barrels and rely on those to do the alignment?
The reason I ask is I think my Pentax 8x20 DCF ED are out judging by the eyestrain I'm getting in my right eye and the last time that happened was with a Hawke Sapphire which when replaced by Hawke completely eliminated the problem although in both cases there was never any double image so it's hard to tell but I don't get eye strain from my other bins and that includes my very similar RSPB 8x20 HD.
So I think they are buggered. I put in a query to Pentax but probably won't hear anything for a few days given it's the weekend.
I don't think this Pentax is as bad as the Hawke was so it's taken me a while to be sure that the Pentax is causing me the eyestrain but it seems pretty much certain now and could partly explain why I've been having some difficulties with it when trialing it outdoors.
Hoping that I can get it fixed as working properly it could be very nice.
Hope Pentax will be able to help.
One thing I do notice is that the prisms are not mirror symmetrically aligned but I'm not sure if this is even important. The right one is about 180 deg rotated compared to the left i.e. the sort of arrow side to the prism looking at the eyepieces is pointing NE on the right and SE on the left side when the left I think should mirror the right side and point NW???
In other words the right side prism is upside down. Actually this might just be the problem as when I turn the bin upside down and try the right side just with my right eye it seems less straining.
I think writing this I may have worked through the problem
I doubt this though as I've never found orientation to affect my roof prism monoculars but it does seem less straining when I rotate the bin 180deg and try the right side again???
Ok maybe it's not that as when I try the rotated left side it's still much clearer than right side so maybe some fuzziness in the right side but the right side does get less fuzzy when it is rotated.
Ok I'm confused and I'm sure anyone reading this is now also. The eyestrain is definitely real though. That is a certainty.
If I don't get anywhere with Pentax (already got ticket request ref no. back from them to respond to my query within two days) I might be tempted to wrench the right eyepiece off and rotate the prism. It looks as though it is just threaded to the main body of the bin. That's if it becomes a nothing to loose situation as it seems now that I will not be able to use them as they are and ok I will loose any gas filling if there is any but if it fixes them otherwise it has to be worth a try as what I have seen with them as far sharpness, contrast, general quality of view is good and impressive.
The reason I ask is I think my Pentax 8x20 DCF ED are out judging by the eyestrain I'm getting in my right eye and the last time that happened was with a Hawke Sapphire which when replaced by Hawke completely eliminated the problem although in both cases there was never any double image so it's hard to tell but I don't get eye strain from my other bins and that includes my very similar RSPB 8x20 HD.
So I think they are buggered. I put in a query to Pentax but probably won't hear anything for a few days given it's the weekend.
I don't think this Pentax is as bad as the Hawke was so it's taken me a while to be sure that the Pentax is causing me the eyestrain but it seems pretty much certain now and could partly explain why I've been having some difficulties with it when trialing it outdoors.
Hoping that I can get it fixed as working properly it could be very nice.
Hope Pentax will be able to help.
One thing I do notice is that the prisms are not mirror symmetrically aligned but I'm not sure if this is even important. The right one is about 180 deg rotated compared to the left i.e. the sort of arrow side to the prism looking at the eyepieces is pointing NE on the right and SE on the left side when the left I think should mirror the right side and point NW???
In other words the right side prism is upside down. Actually this might just be the problem as when I turn the bin upside down and try the right side just with my right eye it seems less straining.
I think writing this I may have worked through the problem
I doubt this though as I've never found orientation to affect my roof prism monoculars but it does seem less straining when I rotate the bin 180deg and try the right side again???
Ok maybe it's not that as when I try the rotated left side it's still much clearer than right side so maybe some fuzziness in the right side but the right side does get less fuzzy when it is rotated.
Ok I'm confused and I'm sure anyone reading this is now also. The eyestrain is definitely real though. That is a certainty.
If I don't get anywhere with Pentax (already got ticket request ref no. back from them to respond to my query within two days) I might be tempted to wrench the right eyepiece off and rotate the prism. It looks as though it is just threaded to the main body of the bin. That's if it becomes a nothing to loose situation as it seems now that I will not be able to use them as they are and ok I will loose any gas filling if there is any but if it fixes them otherwise it has to be worth a try as what I have seen with them as far sharpness, contrast, general quality of view is good and impressive.
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