Thanks Chuck,
Inquiry away. Always was fond of Orion.
Mike
Sent from my iPhone
On Dec 26, 2014, at 10:29 PM, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
wrote:
> The moon isn't out but Orion's belt and sword are shining brightly. The
> Pentax thingies definitely focus well past infinity. But I can't tell you if
> it's -3 diopters worth. Let the Ricoh service reps earn their bread. See
> this page for Pentax/Ricoh support contact info
> <http://www.us.ricoh-imaging.com/support>
>
> Chuck Norcutt
>
>
> On 12/26/2014 1:33 PM, Mike Gordon via olympus wrote:
>>
>> CN writes:
>>
>>>> I think she may be good. I'm sure that the diopter adjustment is
>>>> relative to the other eyepiece so it shouldn't matter what the
>> focusing
>>>> distance is. If it will go beyond infinity I should think that will
>>>> combine with the -2 on the diopter to go further minus. I'm in the
>>>> house now and the furthest thing I can see is a tall radio tower that
>>>> I'd guess to be 1/2 mile or further away. I put the 200/4 on my OM-1
>>>> with split image screen and that combination thinks the tower is at
>>>> infinity. When it's focused the focusing collar is hard up against
>> the
>>>> infinity stop. Then I decided to try the 70-300 on the E-M5 at 300mm
>>>> first with autofocus followed by manual adjustment. At 300mm on the
>>>> E-M5 the tower is not at infinity but there's not much focusing
>> beyond it.
>>
>>>> If I try the same thing on the Pentax 8x25s it focuses way, way
>> beyond
>>>> the tower. If I think of it and the moon is out tonight I'll try
>> again
>>>> on the moon which any optical system will say is at infinity.
>>
>> Thanks Chuck,
>>
>> As I read a bit more, I see the diopter correction on the binoculars is
>> just for equalizing the focus between the two eyes (very unlike the
>> diopter corrections for camera VF's) and they leave at least some play
>> in the focusing for those who are near or far-sighted and don't wish to
>> use glasses or contacts. Whether they leave 4 or 5 diopters worth for
>> any given model is unclear. That could be tested easily enough.
>> I suppose they should list that parameter in the specs.
>>
>> Loony Mike
>>
>>
>>
>>
>> On 12/25/2014 2:27 PM, Mike Gordon via olympus wrote:
>>> Thanks flutteringby Moose and Chuck. Yes the Pentax website says +/-
>> 2
>>> diopters for the 8X25's. I really don't know enough about these
>> items.
>>> I don't know if that is the correction between left and right
>>> or the overall correction. I suspect 6ft is often close enough as any
>>> closer I will have my flutterby macro kit at the ready. The -2 could
>> be
>>> an issue. Looking into this a bit more I see NABA (North Am b'fly
>>> Assoc) has a page on b'fly binoculars but they are not as gear savvy
>> as
>>> here. Have a presentation at the Pituitary Soc meeting followed by
>>> another meeting in San Diego in March and I see Marnie bought a flt
>> to
>>> SF as well as hers to SF, so perhaps can try Moose's again if all
>> works
>>> out.
>>>
>>> Hovering over a couple choices but unable to land yet, Mike
>>>
>>>
>>>
>>> CN writes:
>>>
>>>>> No markings on diopter correction eyepiece. Maybe Pentax site has
>>> specs.
>>>
>>>
>>>
>>>
>>> On 12/24/2014 5:36 PM, Mike Gordon via olympus wrote:
>>>> Oh, forgot to ask about diopter corrections. It seems one adjusts
>>> this
>>>> so each eye is sharp but what if say Marnie uses w/o contacts and has
>>> a
>>>> -4 or -5 correction.
>>>> It would seem one might be able to focus closer but infinity focus
>>> might
>>>> be an issue unless it allows one to focus well past it for those with
>>> 0
>>>> correction required.
>>>>
>>>> Mike
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
--
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