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It's either the greatest super-tele bargain in history...
Posted By: pathdoc, 04-08-2016, 05:36 AM

...or proof of the adage about a fool and his money. Opteka 420-800mm f/8.3 zoom for Pentax, $129.99 with free shipping on Amazon.ca

Look at that minimum aperture... no, wait, look at that discount (was $499.99)!!

Heck, it's almost worth buying just to see how good/bad it is.

And in the also-viewed bar below, there are even more extreme variants on the same thing. I have the feeling that most of these are amateur refractor telescopes with K-mounts fused to the back end, but maybe someone has shot with them and can share?

Last edited by photolady95; 04-08-2016 at 05:57 AM. Reason: changed wording to reflect family oriented forum
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04-08-2016, 06:51 AM   #2
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I've seen this one around (it's one of a few like this). I doubt it was ever really $500 because it's been around $100-200 for a while. From what I gather, it's a "you get what you pay for" situation. There are some fringe situations where it could be useful but it's way too slow for practical purposes.
04-08-2016, 07:00 AM   #3
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Okay, pathdoc, you've entered the "T-mount" phase of LBA. No need to panic (it's not as bad as the East German variant) - just hide your wallet for a few days. Those cheap Chinese (or rebadged Samyang) T-mount tele lenses are, in general: soft, have terrible contrast, and lots of CA and fringing. With a good tripod, BRIGHT sunlight, and a lot of PP, you can get an average-looking image. A * lens on a Q adapter will blow it away every day.
04-08-2016, 07:00 AM   #4
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f/8.3 - f/16 Yikes.
Get a massive flash and a flash extender. Could be fun for some shots but patience will be required.

04-08-2016, 07:58 AM   #5
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QuoteOriginally posted by THoog Quote
Okay, pathdoc, you've entered the "T-mount" phase of LBA.
I did say "Almost". Don't worry, not going near it, but figured someone who likes to play with odd and fringe stuff at low cost might want to know.

QuoteOriginally posted by UncleVanya Quote
Get a massive flash
Perhaps something like this?
04-08-2016, 08:25 AM   #6
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QuoteOriginally posted by THoog Quote
A * lens on a Q adapter will blow it away every day.
good advice

m
04-08-2016, 08:26 AM   #7
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QuoteOriginally posted by pathdoc Quote
Perhaps something like this?
Bigger!
04-08-2016, 08:33 AM   #8
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QuoteOriginally posted by bertwert Quote
Bigger!
I wanted something to illuminate the countryside from a height, not turn it into molten slag. But if you insist...



04-08-2016, 09:09 AM   #9
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I found the perfect camera for this lens:

04-08-2016, 09:25 AM   #10
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What on earth is that?

(I'm not saying you're wrong!)
04-08-2016, 09:30 AM   #11
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There are a number of reviews on U-tube.
And there is a similar but even more extreme 650-1300mm.

Found this:

http://www.thephotoforum.com/threads/prooptic-420mm-800mm-impressions-and-review.135930/
04-08-2016, 10:38 AM   #12
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QuoteOriginally posted by pathdoc Quote
What on earth is that?

(I'm not saying you're wrong!)
Nikai Royal "Big View", a toy camera that some less savoury individuals have tried to pass off as serious equipment. Also known as Olympia, Olempia (really), Nokina, Sony (at least two instances in Google Image Search), and others depending on the stick-on label on the front of the "prism" housing.
04-08-2016, 10:44 AM   #13
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QuoteOriginally posted by aremmes Quote
Nikai Royal "Big View", a toy camera that some less savoury individuals have tried to pass off as serious equipment. Also known as Olympia, Olempia (really), Nokina, Sony (at least two instances in Google Image Search), and others depending on the stick-on label on the front of the "prism" housing.
They show up on shopgoodwill.com all the time. I'm not sure that even the Lomography crowd would buy them.
04-08-2016, 11:13 AM   #14
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QuoteOriginally posted by boriscleto Quote
I'm not sure that even the Lomography crowd would buy them.
In the manner of Foghorn Leghorn - Them's... ah say, them's fightin' words!
04-08-2016, 01:13 PM   #15
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I have a friend who tells this story. A sister of a photographic wiz once asked what kind of flash she needed for moon pictures - he told her the only way he could see it working would be a very large flashbulb... large enough to burn off the atmosphere of the earth in the process!
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