Marianne Oelund

Marianne Oelund

Lives in United States Seattle region, WA, United States
Works as a Electronics Engineer
Has a website at actionphotosbymarianne.com
Joined on Jan 22, 2004
About me:

To have great value, life and knowledge must last, therefore we should first seek eternal truth and life, available to us through the abounding love and grace of our Savior.
I find inspiration from the following authors and works, which have my highest recommendation. Please do not miss reading at least a few of these!
The Word: Holy Bible. H. A. Baker, Rolland and Heidi Baker: various. Pastor Surprise Sithole: Voice in the Night. Mel Tari: Like a Mighty Wind. Dr. James Maloney: various. Guillermo Maldonado: various. Anna Rountree: Heaven Awaits the Bride. Dale and Paula Black: various. Rev. Elwood Scott: 40 days in Heaven, the story of Seneca Sodi. Praying Medic: Divine Healing made Simple. Blake Healy: The Veil.

Marianne Oelund's recent activity

  • I judge true SA for these lenses to be within the 0 - 2R range, so the DC ring calibration error is small.  In the case of my lens, with the DC ring at Center, SA is so under-corrected that it ...
  • Thank you for taking the time to post your test images. I do not agree that best SA correction is occurring at 2.5 R.  I see it between 0 and 2R, perhaps closer to 2R than 0, for both lenses. This ...
  • You shouldn't. According to your original post, re-focusing slightly so the viewfinder image appears sharp, then results in a mis-focused photo. By design, it is not possible for missing glasses, ...
  • Your viewscreen is mounted incorrectly, and/or the reflex mirror alignment has been disturbed.  Hopefully you purchased your camera new from a reputable dealer.  If it was a second-hand purchase, ...
  • It was close to nominal.  I never had to set the DC ring beyond F2 before, to achieve best IQ at f/2.
  • Light level, lighting color, subject color, subject detail, lens aperture, subject distance, atmospheric lensing, susceptibility of the AF system to noise . . . Temperature variations affecting the ...
  • Replied in Easy: D3s
    Still own and heavily use both D3s bodies purchased in 2009-2010.  For my purposes, it remains the best indoor sports action camera that Nikon ever made.
  • Replied in DC ring scale
    If we look at the range F2 to F5.6, the ring is marked such that the numbers follow powers of two where the exponent is a linear function of ring rotation (or detent number, since they are equally ...
  • It amazes me that anyone would expect a 20mm lens at f/1.8 on a full frame camera to be free of coma.  Who are these people? The only lens I own which I might consider using for astro wide open is ...
  • This afternoon, I had an opportunity to take test images with a rental 135/2 DC and 105/2 DC. On the 135/2, the DC ring was very well-centered, with Center being better than both F2 and R2, and ...
  • Replied in Query?
    From the opening post: "Focusing must be re-done manually for each DC-ring position using Live View" So far, everyone else seems to have understood that instruction.
  • Here is my composite of test photos that I took.  The green circles are images of a pinpoint light source, i.e., they are the lens point-spreads. You can see the effect that SA has on contrast, by ...
  • Any 12Mpix body would be more than sufficient for this test.  You're mainly looking for what DC-ring setting produces best contrast, and close examination of edges isn't necessary.  It will be ...
  • AF aside, is the optical performance of your lens at f/2 best with the DC ring centered, or does it improve if it is offset slightly?
  • I see - yours has a slight misalignment between the detents and the markings. My lens doesn't have any significant misalignment in that respect, i.e., the detents hold the DC ring where the ...
  • In my case, Nikon service had already disassembled/reassembled the lens in order to replace mechanical components related to focus. They re-installed the DC ring very far off center (not between ...
  • Boring is good, in this case.  Then your optimal DC ring setting would be between 0 and F2, and probably closer to 0 than the F2 detent. Thanks very much, Michael
  • Following recent service at Nikon for focus-helicoid mechanical issues, I have found that the Defocus Image Control ring on my 135/2 DC is significantly off-center. I attempted to have Nikon ...
  • It is quite possible that there is a mechanical problem with the focus helicoid or related parts, rather than the AF motor.  I have had AF motors need replacement in several lenses, but none of ...
  • Completely disagree that this lens isn't designed to be sharp at wide apertures. It is not merely an "effects lens." If yours doesn't seem sharp at f/2, check the DC ring calibration by taking a ...
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Marianne Oelund has not added any gear yet.
Total messages 5074
Threads started 74
Last post 3 weeks ago
Total comments 5
Total likes 6
Last post Dec 3, 2013
Total reviews 1
Last review Jan 23, 2004
Entries 1
Votes cast 0
Last entry Oct 17, 2012
Photos uploaded 82
Last upload 11 months ago