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**Pål Jensen** · 04-17-2014, 08:59 AM

I wonder if the coming wide angle zoom will be a DA lens; ie for the current cropped 645 sensors. That could make it a lot cheaper...

Royce Howland · 04-17-2014, 09:38 AM

Yes, I'm curious about that as well. If Pentax continues to produce new DFA designs, that may signal they're keeping their options open for a full frame 645 body. If they start producing mainly DA designs then we're probably looking at the current 44 x 33 mm (ish) sensor format for some time...

Hakusan · 04-19-2014, 08:56 PM

Originally posted by Royce Howland

It's a bit difficult to judge the price or value of the Pentax DA 25mm because virtually nobody has made a lens wider than 30 - 35mm for any medium format system, with the modern specs and performance of the Pentax lens.

Hasselblad has a 24mm and a 28mm for their H series cameras, Leica has a 25mm for the S, Mamiya a 28mm for their Phase cameras, Rodenstock has 23mm and 28mm lenses for tech cameras, and Schneider has 24mm and 28mm lenses. All modern lenses, all a little or a lot more than the Pentax, except for the Schneider lenses. In the MFD world, that would be virtually everybody.

---------- Post added 04-19-14 at 11:58 PM ----------

The new wide-angle zoom appears to be a 33-55mm lens. I think it will be in line with the DFA pricing rather than the FA pricing.

**Pål Jensen** · 04-20-2014, 04:07 AM

Originally posted by Hakusan

[/COLOR]The new wide-angle zoom appears to be a 33-55mm lens. I think it will be in line with the DFA pricing rather than the FA pricing.

What makes you think it is a 33-55 lens? There already is one. Whats needed is a wider zoom due to the crop factor; perhaps a 28-45?

Paul Ewins · 04-20-2014, 05:53 AM

I'm wondering about the second lens since that looks to directly duplicate the 45-85 zoom. I can't imagine that a refresh would be marked as a new lens. All I can think of is adding in-lens SR or making it faster. Either option would be expensive.

Hakusan · 04-20-2014, 08:55 AM

Originally posted by Pål Jensen

What makes you think it is a 33-55 lens? There already is one. Whats needed is a wider zoom due to the crop factor; perhaps a 28-45?

My bad. I was looking through a Japanese web site on the new 645Z and there was a reference to a wide-angle zoom, but it was the old FA, not DFA. Hopefully a 28-45mm. That would be nice.

Royce Howland · 04-21-2014, 08:34 AM

Bad research by me.

Looks like there are more MF ultrawides than I was aware from previous looking around. Nevertheless the conclusion remains: the Pentax 25mm is reasonably spec'ed and priced for what it is.

Omaha · 04-21-2014, 01:17 PM

Does Pentax have a leaf shutter lens in the 150mm (ish) range? I'm doing a little poking around, and I don't see anything.

I hope there is such a thing. That would make the 645z very attractive to me. As it is, with a flash sync speed of only 1/125s with the focal plane shutter, its a no go.

**gofour3** · 04-21-2014, 04:17 PM

Originally posted by Omaha

Does Pentax have a leaf shutter lens in the 150mm (ish) range? I'm doing a little poking around, and I don't see anything.

I hope there is such a thing. That would make the 645z very attractive to me. As it is, with a flash sync speed of only 1/125s with the focal plane shutter, its a no go.

Yep:

SMC Pentax 645 LS 135mm F4 Reviews - 645 Telephoto Primes - Pentax Lens Reviews & Lens Database

Phil.

Omaha · 04-21-2014, 04:19 PM

But nothing with AF?

**gofour3** · 04-21-2014, 04:30 PM

All the Pentax 645 and 6x7 leaf shutter lenses are manual focus.
Phil.

Omaha · 04-21-2014, 05:02 PM

There's the problem right there. To get me to make the jump to MF digital (I shoot film now...I use Mamiya RB67 system) would require modern lenses with electronic leaf shutters syncing to 1/1600 or so. If I'm going to be stuck with mechanical shutters and manual focus....well, I already have that.

Thomas · 04-21-2014, 05:34 PM

Originally posted by Pål Jensen

I wonder if the coming wide angle zoom will be a DA lens; ie for the current cropped 645 sensors. That could make it a lot cheaper...

I would like to think you're correct, but the DA 25mm is sold at the same price of the formerly offered D FA in the US.

bull drinkwater · 05-16-2014, 05:18 AM

Originally posted by uintaangler

Hope this isn't a dumb question, but here goes…..
Why does the 25mm Pentax SMC 645 lens cost over $4,000?
Even when compared to Pentax's other new lenses for the 645D or 645Z that is significantly higher
Is it particularly difficult to produce UWA lenses for Medium Format cameras?
Is this lens that good?
Thanks

the real question is whether the smc 645 is scaled down to match the smaller 645d sensor. otherwise it's not that much of a wide angle lens.

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04-17-2014, 08:59 AM	#16
Pål Jensen Site Supporter Join Date: Dec 2007 Location: Norway Photos: Albums Posts: 4,371	I wonder if the coming wide angle zoom will be a DA lens; ie for the current cropped 645 sensors. That could make it a lot cheaper...

04-17-2014, 09:38 AM	#17
Royce Howland Senior Member Join Date: Nov 2010 Location: Calgary, Alberta Posts: 275	Yes, I'm curious about that as well. If Pentax continues to produce new DFA designs, that may signal they're keeping their options open for a full frame 645 body. If they start producing mainly DA designs then we're probably looking at the current 44 x 33 mm (ish) sensor format for some time...

04-19-2014, 08:56 PM	#18
Hakusan Forum Member Join Date: Apr 2014 Location: Maine Posts: 51	Originally posted by Royce Howland It's a bit difficult to judge the price or value of the Pentax DA 25mm because virtually nobody has made a lens wider than 30 - 35mm for any medium format system, with the modern specs and performance of the Pentax lens. Hasselblad has a 24mm and a 28mm for their H series cameras, Leica has a 25mm for the S, Mamiya a 28mm for their Phase cameras, Rodenstock has 23mm and 28mm lenses for tech cameras, and Schneider has 24mm and 28mm lenses. All modern lenses, all a little or a lot more than the Pentax, except for the Schneider lenses. In the MFD world, that would be virtually everybody. ---------- Post added 04-19-14 at 11:58 PM ---------- The new wide-angle zoom appears to be a 33-55mm lens. I think it will be in line with the DFA pricing rather than the FA pricing.

04-20-2014, 04:07 AM	#19
Pål Jensen Site Supporter Join Date: Dec 2007 Location: Norway Photos: Albums Posts: 4,371	Originally posted by Hakusan [/COLOR]The new wide-angle zoom appears to be a 33-55mm lens. I think it will be in line with the DFA pricing rather than the FA pricing. What makes you think it is a 33-55 lens? There already is one. Whats needed is a wider zoom due to the crop factor; perhaps a 28-45?

04-20-2014, 05:53 AM	#20
Paul Ewins Senior Member Join Date: Sep 2009 Location: Melbourne, Australia Photos: Albums Posts: 274	I'm wondering about the second lens since that looks to directly duplicate the 45-85 zoom. I can't imagine that a refresh would be marked as a new lens. All I can think of is adding in-lens SR or making it faster. Either option would be expensive.

04-20-2014, 08:55 AM	#21
Hakusan Forum Member Join Date: Apr 2014 Location: Maine Posts: 51	Originally posted by Pål Jensen What makes you think it is a 33-55 lens? There already is one. Whats needed is a wider zoom due to the crop factor; perhaps a 28-45? My bad. I was looking through a Japanese web site on the new 645Z and there was a reference to a wide-angle zoom, but it was the old FA, not DFA. Hopefully a 28-45mm. That would be nice.

04-21-2014, 08:34 AM	#22
Royce Howland Senior Member Join Date: Nov 2010 Location: Calgary, Alberta Posts: 275	Bad research by me. Looks like there are more MF ultrawides than I was aware from previous looking around. Nevertheless the conclusion remains: the Pentax 25mm is reasonably spec'ed and priced for what it is.

04-21-2014, 01:17 PM	#23
Omaha Inactive Account Join Date: Jan 2013 Posts: 17	Does Pentax have a leaf shutter lens in the 150mm (ish) range? I'm doing a little poking around, and I don't see anything. I hope there is such a thing. That would make the 645z very attractive to me. As it is, with a flash sync speed of only 1/125s with the focal plane shutter, its a no go.

04-21-2014, 04:17 PM	#24
gofour3 Site Supporter Join Date: Oct 2008 Location: Vancouver, Canada Posts: 8,092	Originally posted by Omaha Does Pentax have a leaf shutter lens in the 150mm (ish) range? I'm doing a little poking around, and I don't see anything. I hope there is such a thing. That would make the 645z very attractive to me. As it is, with a flash sync speed of only 1/125s with the focal plane shutter, its a no go. Yep: SMC Pentax 645 LS 135mm F4 Reviews - 645 Telephoto Primes - Pentax Lens Reviews & Lens Database Phil.

04-21-2014, 04:19 PM	#25
Omaha Inactive Account Join Date: Jan 2013 Posts: 17	But nothing with AF?

04-21-2014, 04:30 PM	#26
gofour3 Site Supporter Join Date: Oct 2008 Location: Vancouver, Canada Posts: 8,092	All the Pentax 645 and 6x7 leaf shutter lenses are manual focus. Phil.

04-21-2014, 05:02 PM	#27
Omaha Inactive Account Join Date: Jan 2013 Posts: 17	There's the problem right there. To get me to make the jump to MF digital (I shoot film now...I use Mamiya RB67 system) would require modern lenses with electronic leaf shutters syncing to 1/1600 or so. If I'm going to be stuck with mechanical shutters and manual focus....well, I already have that.

04-21-2014, 05:34 PM	#28
Thomas Veteran Member Join Date: Feb 2008 Photos: Gallery \| Albums Posts: 434	Originally posted by Pål Jensen I wonder if the coming wide angle zoom will be a DA lens; ie for the current cropped 645 sensors. That could make it a lot cheaper... I would like to think you're correct, but the DA 25mm is sold at the same price of the formerly offered D FA in the US.

05-16-2014, 05:18 AM	#29
bull drinkwater Loyal Site Supporter Join Date: Nov 2011 Location: pontiac mi. Posts: 392	Originally posted by uintaangler Hope this isn't a dumb question, but here goes….. Why does the 25mm Pentax SMC 645 lens cost over $4,000? Even when compared to Pentax's other new lenses for the 645D or 645Z that is significantly higher Is it particularly difficult to produce UWA lenses for Medium Format cameras? Is this lens that good? Thanks the real question is whether the smc 645 is scaled down to match the smaller 645d sensor. otherwise it's not that much of a wide angle lens.

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