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About olegam

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  • Camera Model & Brand
    Nikon F3, Nikon D200
  • Camera Housing
    Hugyfot F3, Hugyfot D200
  • Strobe/Lighting Model & Brand
    2x Ikelite MV (now retired), 2x Ikelite AI, 1x Subatec S200, 2x Inon 240
  • Accessories
    ULCS + Ikelite strobe arms
  1. Hi Liz, That is understandable. But I live in Norway, so perhaps a bit cumbersome to ship the strobes to Australia. We'll see. Regards Ole
  2. Great info! I have two old Z240s that is starting to get the same syptoms. Do you have any details on the tubes your friend ordered? There are many to choose from on ebay... Regards Ole
  3. Inge Lenmark is a Swedish photographer. He have always used self-built underwater strobes, based on standard strobes. Look here: http://www.lennmark.se/Kameror/Rollei_Metz/Frameset_en.htm
  4. Alex, In my opinion, this is the most exciting underwater photography news in many, many years. Ever since I sold my Nikonos cameras, including the 15mm and started using SLRs in 1990 I have struggled with sharpness when using wide angle lenses. Many years ago I read an article written by one of the original members of the BSoUP. Back in the 60's, they had to make a lot of the kit themselves, because there was not much that could be bought. The corrector port was one of the things that was popular to make. They made them of acrylic material that was shaped (in a lathe, I presume) and then polished up. But the corrector was soon taken over by the dome ports as it was much easier to make. Seing that the corrector is close to impossible to find, the only alternative appears to make one. The design is described well in many books. And its not new. Introduced by Gallileo Gallilei. The corrector uses the principle in the reversed way. Also used for optical viewfinders for rangefinder cameras. From what I have been able to find out the formula for a Reverse Galileo telescope is Fp + Fn = d, where Fp is the focal lenght of the convex lens, Fn the focal lenght for the plano-concave lens, and d is the distance between them. The Rebikoff corrector will correct the magnification of 1.33 caused by the front port by adding a 0.75 magnification. Fn = 0.75 x Fp. I have attempted to calculate, using a +4 close-up lens (the Fp) as a starting point. The positive lens (a given) focal lenght is 25 cm. The plano-concave lens is 18.75 cm. The distance between the two is 62.5mm. Do you know the focal lenghts for the two lenses involved on your corrector? And the distance between them? Does my figures make sense when compared to the real thing?
  5. In order to retain image quality when using close-up lenses on AF Micro Nikkors (and possible also the MF 200/4 Micro Nikkor) it is advised to mount them in a reversed position. A thread reversal ring is then needed. I could not obtain one and solved the problem with two Cokin filter rings glued together. The reason why reversal gives better result is said to be improved spherical aberration.
  6. I have for years used wet connectors from Marshall. These are equal to the Electro Oceanics connectors that used to be popular some years ago. The connectors are cheap and reliable. The downside is that you only can use the strobe in manual mode. There are other alternatives that will make it possible to use TTL. One of these is Subconn. Subconn is even better than EO/Marshall and available in many configurations. The company that sells these connectors is MacArtney. They have branches all over the world. The use of such connectors will of course require some work attaching the strobe connector to the cable.
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