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Minolta RF 1600 (1600mm mirror lens) on eBay
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PostPosted: Sat Jan 15, 2022 5:24 pm    Post subject: Minolta RF 1600 (1600mm mirror lens) on eBay Reply with quote

This lens comes up for sale only very rarely, Minolta's 1600mm Mirror lens.

https://www.ebay.co.uk/itm/284596864151

Almost 6.3kg and near US$ 10,000 asked. Still, I would hate to think what a 1600mm refractive version would weigh (and cost).

It may be coincidence, but the only ones I have ever seen on sale were all from South Korea.

Unless it is the same lens being passed around between South-Korean sellers & buyers, it does make me wonder if the South Korean army once bought a lot of them to peek over the demilitarised zone, and which have now ended up in private hands there.


PostPosted: Sat Jan 15, 2022 5:43 pm    Post subject: Reply with quote

Ultimate girl watcher lens! (North Korean girls that is)


PostPosted: Sat Jan 15, 2022 8:02 pm    Post subject: Re: Minolta RF 1600 (1600mm mirror lens) on eBay Reply with quote

RokkorDoctor wrote:

. Still, I would hate to think what a 1600mm refractive version would weigh (and cost).


The Takumar 1000/8 weighs about 6.1kg and could be converted to a 1500/12 lens with a x1.5 multiplier. I've already used it with a x2 multiplier and it was still good for shooting the sun handheld.


PostPosted: Sat Jan 15, 2022 8:40 pm    Post subject: Reply with quote

Just got the cheap teleplus 2x MC7 to add it to rf80cm , the MC7 without macro it came out very cheap, hopefully as multiplier the quality would be the same on both of em


PostPosted: Sat Jan 15, 2022 9:45 pm    Post subject: Reply with quote

Plenty of excellent, new telescopes available for that money.

I know photographic mirror lenses can often be quite a bit smaller than the equivalent telescope (particularly at 500mm). So even old ones can have an advantage over the newest telescope.

Just judging by eye, this doesn't seem to be the case with this 1600mm. Still, extremely cool.

EDIT: I remember there's something interesting about the focusing mechanism on this, there's a slot at the front for a lever to connect to the secondary mirror. Not sure who covered it.


PostPosted: Sun Jan 16, 2022 9:21 am    Post subject: Reply with quote

eggplant wrote:

EDIT: I remember there's something interesting about the focusing mechanism on this, there's a slot at the front for a lever to connect to the secondary mirror. Not sure who covered it.


That would be on the earlier (black) incarnations of this lens (and the RF 800). There was a rod poking through a slot on the side of the lens, that rotates a helicoid for the secondary (front) mirror of the lens.

Minolta changed the focus mechanism on the last (white) versions of these RF 800 and RF 1600 lenses; the rod is still there but they lost the visible slot on the side of the lens, and the focus scale thus looks a bit more conventional. You can see the rod in the frontal images on the eBay listing (or google it)

The idea is that the rod is both thin enough and far enough out of focus not to be visible in the image. However; I would imagine that it might be visible in the bokeh of out-of-focus specular highlights or point light sources; the bokeh doughnuts then possibly may have a very small gap in them. I shall try this on the RF 800 one day.


PostPosted: Mon Jan 17, 2022 10:27 am    Post subject: Reply with quote

Would be great to complete a collection... but 10000$ ?... makes the 600 mm APO look almost cheap... So no chance!


PostPosted: Mon Jan 17, 2022 2:32 pm    Post subject: Reply with quote

Focussing one of the mirrors by lever is much preferable to turning a helix moving the entire construction especially on a tripod. At least that is my experience (using the RF800 in its Leica mount version).

p.


PostPosted: Mon Jan 17, 2022 4:17 pm    Post subject: Re: Minolta RF 1600 (1600mm mirror lens) on eBay Reply with quote

The Takumar 1000/8 weighs about 6.1kg and could be converted to a 1500/12 lens with a x1.5 multiplier. I've already used it with a x2 multiplier and it was still good for shooting the sun handheld.[/quote]
And now your right eye is blind? 😳


PostPosted: Mon Jan 17, 2022 6:11 pm    Post subject: Re: Minolta RF 1600 (1600mm mirror lens) on eBay Reply with quote

Phalbert wrote:
The Takumar 1000/8 weighs about 6.1kg and could be converted to a 1500/12 lens with a x1.5 multiplier. I've already used it with a x2 multiplier and it was still good for shooting the sun handheld.

And now your right eye is blind? [/quote]

Or you could use any number of the 800mm f5.6 lenses with a 2x TC for 1600mm f11. Far cheaper, more common, smaller.

paulhofseth wrote:
Focussing one of the mirrors by lever is much preferable to turning a helix moving the entire construction especially on a tripod. At least that is my experience (using the RF800 in its Leica mount version).

p.


Don't know why that wasn't obvious- very good point!


PostPosted: Mon Jan 17, 2022 7:57 pm    Post subject: Re: Minolta RF 1600 (1600mm mirror lens) on eBay Reply with quote

Phalbert wrote:
The Takumar 1000/8 weighs about 6.1kg and could be converted to a 1500/12 lens with a x1.5 multiplier. I've already used it with a x2 multiplier and it was still good for shooting the sun handheld.

And now your right eye is blind? 😳[/quote]

Nope and I've done several sunset pictures with 500/1000/2000mm lenses. I suppose that the whole configuration (sun trough more atmosphere, very dark configurations (f/22-32 at real aperture, light going trough both lens and prism, qucik shots without staring at the light...) is what saved me from losing my eyes. Now I am aware of this danger and I will not retry even if I think this is not immediately dangerous.


PostPosted: Tue Jan 18, 2022 12:08 am    Post subject: Reply with quote

Antoine wrote:
Would be great to complete a collection... but 10000$ ?... makes the 600 mm APO look almost cheap... So no chance!


I hear ya. Whenever I see hugely inflated prices for camera optics, my first reaction is to look at equivalent telescopes. For that kind of money, I could buy TWO Meade 10" f/10 LX200 telescopes. Not optical tubes, but the complete telescopes. A 10" f/10 telescope has a focal length of 2540mm. And it's even a fraction of a stop faster. These big Meade (or Celestron) SCTs are diffraction-limited optics. Basically as good as they get.

Years ago, I owned a Meade 10" LX3, and I actually used it for terrestrial photography on occasion. It was impressively sharp. Yes, it's bigger than the Minolta by a sizable amount, but if that's too much for you, then there's always the 8" Meade (or Celestron). The 8" Meade sells new for between $3500 and $4100, depending on configuration. The optical tube is a 2032mm f/10 lens. Celestron also makes a C5 -- a 5 inch SCT. 1250mm f/10, but you can buy it configured as a spotting scope (basically configured as a lens) for $800 new.


PostPosted: Tue Jan 18, 2022 7:48 am    Post subject: Reply with quote

Nice price. Luckily I rarely go over 85mm and now I know why.
Laugh 1


PostPosted: Tue Jan 18, 2022 9:23 pm    Post subject: Reply with quote

martinsmith99 wrote:
Nice price. Luckily I rarely go over 85mm and now I know why.
Laugh 1


Best stay above 20mm as well then! Wink


Antoine wrote:
Would be great to complete a collection... but 10000$ ?... makes the 600 mm APO look almost cheap... So no chance!


cooltouch wrote:
I hear ya. Whenever I see hugely inflated prices for camera optics, my first reaction is to look at equivalent telescopes. For that kind of money, I could buy TWO Meade 10" f/10 LX200 telescopes


Inflated against what though? Sure, for photographic purposes there are many other and cheaper options available than the RF 1600, but this price simply reflects the rarity value to collectors. Besides, it is a likely very optimistic asking price; I would hazard a guess that the bid value will be substantially below this Wink

Likewise, last year a Minolta Tele Rokkor-QF 250mm f/4 sold in a Japanese auction for 99,800 Yen (about 870$ / €770 ). Absolutely not worth it from a photographic perspective (described as heavily scratched and dirty optics), but that is one of the rarest if not the rarest Minolta SR lenses around... :



PostPosted: Wed Jan 19, 2022 12:35 am    Post subject: Reply with quote

https://www.cameramanuals.org/minolta_pdf/minolta_lenses-1980s.pdf

Page 8 on my computer, page 12 and 13 on the image.


PostPosted: Sat Jan 22, 2022 11:19 pm    Post subject: Reply with quote

Big boy! Need to do some lifting though... and grossly overpriced!