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12-15-2016, 09:32 AM   #1
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Pentax - Thoughts on making a DA*/DFA 400mm F4?

There is a DA*200 and a DA*300.

Why not a DA*400?

I understand with the new FF, Pentax is not likely designing new DA* lenses. They'll likely focus on DFA models since those can be used on FF and Crop.

But still, if they made a DA*400 F4 or a DFA400mm F4 for that matter, I'd likely buy it.

Paired with the 1.4x HD tc, you could get 560mm F5.6 - and likely in a smaller package than the current 560mm offering.


It just seems like there is not a whole lot of push from Pentax for longer primes.
Are budget-conscious Pentaxian wildlife shooters just a rare breed?


Last edited by UserAccessDenied; 12-15-2016 at 11:26 AM.
12-15-2016, 10:09 AM   #2
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Canon's 400mm f/4 is about 6900$. Yes, it's an advanced design, perhaps Ricoh Imaging could make something cheaper. OTOH, Ricoh Imaging would work with much lower volumes, and this would drive prices back up.

Just to be clear: I'd be happy if Pentax would reach the point where they could launch such lenses, again. But let's be realistic: they would be expensive, very expensive.
(and of course, it would be a D FA - the DA* 200 and 300mm actually cover the FF format, if Pentax had a FF DSLR back then they would've been named D FA as well).
12-15-2016, 10:22 AM   #3
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Actually, a 400 f/4 would have the same huge front element design as the 500 f/5.6. The 400 f/4 + 1.4X TC might be a little shorter than the 500 f/5.6 but it could not be much lighter. Nor would it be much less expensive without giving up a lot on IQ.

A budget 400 would probably need to an f/5.6 and would still be a fairly large lens with a 77 mm filter.

The basic physics of focal length and aperture makes all long, fast lenses very heavy and very expensive.
12-15-2016, 10:32 AM   #4
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Well, by definition any telephoto lens of a comparable focal length would be shorter than the 560mm f/5.6 (which is not a telephoto design).

12-15-2016, 10:33 AM   #5
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I wouldn't give it much thoughts. A large aperture tele line starts with 2.8/300 and 2 converters. Add a 4/600.
Next year we may see a couple FF primes, but nothing super long, super short or spectacular. If a super tele is interesting start with 300mm.
12-15-2016, 10:37 AM - 1 Like   #6
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Probably a lot more realistic is a 400mm f5.6
Canon has one and while a fine lens is in dire need of an update:
Canon EF 400mm f/5.6L USM Lens 2526A004 B&H Photo Video
12-15-2016, 10:45 AM   #7
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QuoteOriginally posted by cali92rs Quote
Probably a lot more realistic is a 400mm f5.6
Canon has one and while a fine lens is in dire need of an update:
Canon EF 400mm f/5.6L USM Lens 2526A004 B&H Photo Video
Meh. If I was shooting wildlife, I'd rather tote around the D-FA 150-450.
12-15-2016, 11:13 AM - 1 Like   #8
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QuoteOriginally posted by lithedreamer Quote
Meh. If I was shooting wildlife, I'd rather tote around the D-FA 150-450.
Me too.
But that lens does have a loyal following. Me personally, the zoom is invaluable.

12-15-2016, 11:26 AM   #9
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QuoteOriginally posted by lithedreamer Quote
Meh. If I was shooting wildlife, I'd rather tote around the D-FA 150-450.
Right,
I was just thinking a 400mm prime seems to be missing from the modern DA lineup.
12-15-2016, 11:35 AM   #10
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QuoteOriginally posted by UserAccessDenied Quote
Right,
I was just thinking a 400mm prime seems to be missing from the modern DA lineup.
But the DA 200 and 300 are full-frame compatible already. Then there's the DA 300 + HD teleconverter which gets you a 400mm f/5.6, or the D-FA 150-450. This would be a third lens that covers that focal length. Are you implying that you'd want it to be APS-C only, to cut down on size and weight?
12-15-2016, 12:06 PM   #11
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QuoteOriginally posted by lithedreamer Quote
But the DA 200 and 300 are full-frame compatible already. Then there's the DA 300 + HD teleconverter which gets you a 400mm f/5.6, or the D-FA 150-450. This would be a third lens that covers that focal length. Are you implying that you'd want it to be APS-C only, to cut down on size and weight?
Personally, yes.
As I have no intentions of buying into the FF market.

I currently own the DA*300, looking at buying the HD tc soon.
I'm just thinking it would be cool to have a DA*400 that could also benefit from the HD tc and still hit F5.6 at 500mm+

I'm not saying Pentax would ever make such a lens, but I'd be interested in it.

---------- Post added 12-15-16 at 02:08 PM ----------

QuoteOriginally posted by cali92rs Quote
Probably a lot more realistic is a 400mm f5.6
Canon has one and while a fine lens is in dire need of an update:
Canon EF 400mm f/5.6L USM Lens 2526A004 B&H Photo Video
Right, but most people would probably just say get a DA*300 with the HDtc for cheaper and more versatility.
If the 400mm was F4, if could benefit from the HDtc as well.

Sure there is the 150-450, but I'm just talking about primes.
12-15-2016, 12:16 PM - 1 Like   #12
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Okay. I understand why you'd want it.

How much would you pay Ricoh for one?
12-15-2016, 12:20 PM   #13
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My Tamron 300 2.8 with the 1.4 gives me 420 ƒ4. Sigma also make 300 2.8., and I believe they have a 2x for theirs.
The Tammy with the 1.7 gives me 510 4.5... an A*300 2.8 with the F 1.7x AF Adapter also gives you 510 with limited AF. On the K-3 thats almost an 800mm FoV and still not 5.6. There are just to many cheaper ways to get there.

Last edited by normhead; 12-15-2016 at 12:25 PM.
12-15-2016, 12:26 PM - 1 Like   #14
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QuoteOriginally posted by lithedreamer Quote
Okay. I understand why you'd want it.

How much would you pay Ricoh for one?
eh, $1797.95
12-15-2016, 12:28 PM   #15
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Pentax already covers 300 f4 to 560 f5.6 for static shots. The only thing they don't cover is 300 f2.8 or 400 f2.8 for when freezing motion is a must (fast shutter speed + medium ISO) but they would also need a kick ass AF to go with the 300/400 f2.8.
Shooting along with Canikon 400 f4 to 600 f4, for static shots they don't have much advantage over the f5.6 lenses of Pentax.
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