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Re: [OM] 600/6.5 on OMD [was: 300/5.3 Mirror Lens [was On topic, well, c

Subject: Re: [OM] 600/6.5 on OMD [was: 300/5.3 Mirror Lens [was On topic, well, could be ...]
From: Rick Beckrich <rbeckrich@xxxxxxxxx>
Date: Sun, 12 Mar 2017 16:13:10 -0400
Well, you got my interests up. I dug out my ancient Sigma-XQ mirror "Ultra
Telephoto" and stuck it on the E-1.

UG! Gives new meaning to narrow zone of focus;
http://zone-10.com/tope2/main.php?g2_itemId=21691

(And proves once again that I can no longer see well enough to focus dim
lenses.) All images are OTC JPGs.

Several of the other shots were with the OMZ 300/4.5 with the tripod in the
same spot.

On Sun, Mar 12, 2017 at 1:18 AM, Moose <olymoose@xxxxxxxxx> wrote:

> On 3/11/2017 3:07 PM, Mike Gordon via olympus wrote:
>
>> Rather than a second tripod the RRS solution options are better.  Draping
>> a shot filled bean bag over the lens may be the final ingredient required
>> if  vibration/movement is the problem.  Using EFCS would also be best.
>>
>>
>> http://www.reallyrightstuff.com/Quick-Release/Multi-Purpose-
>> Rails-Packages/Long-Lens-Support-Packages
>>
>
> That sounds good, and the gear is nice looking, but it flies in the face
> of Gary's extensive practical experience with the same lens. I quote again:
>
> "The second test with "lens support" was probably a tripod head resting
> under the front of the lens hood.  It made no
> difference."
>
> I suspect that "It made no difference." means it didn't work. I can't see
> how a fancy rail, still dependent on a freestanding tripod, is likely to do
> better.
>
> More practical, in that it worked for him, advice based on experience:
>
> "I use the same lens to this day. I shoot at 1/500th or faster
> and drape an arm over the top of the lens and bear down into the tripod
> with
> my weight. I get a very stable setup that way. I hide myself from the wind,
> if there is any.  Don't even try and use one when it is windy out unless
> you
> can shelter yourself.  The hands on the camera technique is worthless for
> shutter speeds of about 1/250th sec. or slower."
>
> The bean bag trick (even w/o  changing out for shot)
>>
>
> Sand works pretty well. My theory is that effectiveness depends on the
> frequency, as well as amplitude, of the vibration, and that it depends on
> other factors in addition to sheer weight. Sand is tiny, irregularly shaped
> pieces of relatively light material. Lead shot is much larger, roughly
> spherical shaped pieces of heavy material. They are bound to behave
> differently as damping material with different vibrations. Walt was the one
> I recall claiming that shot bags were more effective, for the same weight,
> than sand - for this specific purpose of damping aperture shock in OMs.
>
> really helps the Z. 50-250 sharpen up.  It  was an under-rated lens.
>>
>
> I think many mid to long teles were affected by aperture shock. I thought
> my Tokina 50-250 was pretty good. But then, I shot either hand held,
> wetware damping, or with mirror/aperture prefire if on a tripod. That was
> an annoying pain, but it worked, for those FLs.
>
> All our speculation is based on experiences with OM bodies, whereas Jan's
> troubles are with a 4/3 body, heavier, and without aperture shock.
>
> My Celestron 750/6 seems off from previous resolution .  They sell
>> artificial "stars"  and the CAT lens can be aligned by the user, so it
>> seems   Not sure if mine needs a service visit.
>>
>
> I wonder if it is worse than it was, or if your expectations have been
> raised. :-)
>
> This old article on LL about experience with the legendary 800/11 Viv
> solid CAT raises that question for all our older long gear. <
> https://luminous-landscape.com/solid-cat/>
>
> My guess is that what MR got with that gear and very careful technique
> could be equaled or bettered with the PLeica 100-400 on GX8, GX85, E-M5 II
> or E-M1 I or II - hand held.
>
> Progress Is Moose
>
> --
> What if the Hokey Pokey *IS* what it's all about?
>
> --
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
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> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
>


-- 

As much as I hate to "crow", I'm delighted to tell you that my 5-star
reviewed hardcover book for kids, ages 4-to-8,
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is
finally available as an interactive Kindle e-book from Amazon.com.

    (P.S. - The Kindle reader is a free app from Amazon that works on PC,
laptops, and most hand-held devices.)
-- 
_________________________________________________________________
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