Wibmerly mh-100 is not very expensive (this my main “ball head” now). Sasha
On Mon, Dec 28, 2020 at 9:48 AM Godfrey DiGiorgi <[email protected]> wrote: > I don't worry too much about the balance. If you have a ball head capable > of properly supporting a longish lens, it should lock securely no matter > what. > > A ball head is not generally the best for a long tele lens. I've used one > with my mirror 600mm because it's light and short, but it's suboptimal. The > one I like to use the most is the Arca-Swiss Monoball P0 Hybrid ... this > allows me to rough in a position and then adjust the position with > precision using the two goniometers and rotating top mount. But it's an > expensive head (about $900). It works well for astrophotography of bright > subjects (the Moon and Jupiter, for example) where I can usually get away > with a sunlight exposure... If I were doing long exposures with dim > subjects, I'd buy an equatorial clock drive mount. > > For a 400-600 mm refractor lens like the big Pentax guns, a gimbal mount > is the right support. And with these, getting the balance point adjusted > close to the center of mass makes it easier to control them as they are > designed for movement and panning ... a long mounting plate helps. (The > plate I have for my Olympus 50-200mm lens (often used with the matched 1.4x > teleconverter so an effective 560ish mm lens) is about seven inches long > because that lens telescopes about 5 inches through the zoom range and I > often want to adjust it if I'm trying to track a moving subject. I use the > Acratech GP1 head in a "limited" gimbal mount orientation for that lens. > > G > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- --Sasha (from phone) -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
