Any Da 30mm info?

soccerjoe5 · 11-20-2008, 05:27 AM

Originally posted by nixcamic

f1.2 would provide the same DOF as 50mm on full frame, thus killing the whole DOF argument for FF. The extra light gathering ability would also allow you to run at a lower ISO thus killing the high ISO performance aspect of FF.

I'd want better ISO so I can shoot low light with f/8 for more DOF

creampuff · 11-20-2008, 05:29 AM

Well the only 30mm lens Pentax had made was the K 30mm f/2.8...
My wild guess is the mystery DA 30mm would be f/2.

Kirivon · 11-20-2008, 05:40 AM

Why is it that whenever lens prediction threads roll around, everyone always puts down unprecedented apertures? The fastest WA prime Pentax ever made was the M 35 f1.4. It's like when the DA 14 (f2.8) was announced and there was conversation about how neat a 14mm f1.2 would be. The best/fastest at any price/size/weight category is pretty well covered and I'm not sure that Pentax wants to start slugging it out in the 1.5-2k lens ultra-pro market.

At the same time, though, I guess it's kind of boring and pointless to predict a f1.4-f2.

Anyway, the fact that it's a 30 instead of a 31 suggest that the lens may not just be a transplant of the 31LTD into a weathersealed, SDM enabled housing. Optically, I think the 31LTD is one of the best lenses Pentax (or anyone) has on the market, so I'm pretty interested to see if they can improve on it. Either way, one of these lenses will be my next acquisition so I'll be following any news with interest.

roentarre · 11-20-2008, 06:15 AM

Originally posted by creampuff

Well the only 30mm lens Pentax had made was the K 30mm f/2.8...
My wild guess is the mystery DA 30mm would be f/2.

That is the kind of nightmare i am reluctant to admit.

I think it would be f2 too. Otherwise the pricing would be beyond 1500 US dollars ...

Albert Siegel · 11-20-2008, 06:29 AM

Originally posted by roentarre

That is the kind of nightmare i am reluctant to admit.

I think it would be f2 too. Otherwise the pricing would be beyond 1500 US dollars ...

I doubt it... what does the Sigma 30mm 1.4 cost? A 30mm 1.4 DA and sub $500 price would not be out of the question.

eurostar · 11-20-2008, 08:18 AM

Originally posted by Kirivon

Why is it that whenever lens prediction threads roll around, everyone always puts down unprecedented apertures? The fastest WA prime Pentax ever made was the M 35 f1.4.

But this 30 is an APS-C normal lens, not a wideangle. Expecting a F 1,4 aperture, and a relatively cheap price, is not outlandish.

frogger · 11-20-2008, 09:15 AM

Originally posted by thePiRaTE!!

10% side consideration: Pentax still do a good business on the FA31. If they make this lens 1mm wider and equally as fast (not that f2 makes a big difference) then they eclipse the FA. If its 30/2, its still respectable, predictable, will still have all modern weather proofing/SDM amenities yet leaving the mystique of the FA intact.

I would guess its not going to have weather proofing unless its a DA* lense? In which case it could be relatively pricey like the DA*55mm.

thePiRaTE!! · 11-20-2008, 10:22 AM

Originally posted by frogger

I would guess its not going to have weather proofing unless its a DA* lense? In which case it could be relatively pricey like the DA*55mm.

Its a DA* lens, as per the Pentax roadmap.

Kirivon · 11-20-2008, 11:32 AM

Originally posted by eurostar

But this 30 is an APS-C normal lens, not a wideangle. Expecting a F 1,4 aperture, and a relatively cheap price, is not outlandish.

Yes, I was referring more to the f1.2 comment. Given the DA* 55 is about as big as the sigma 30 1.4 I don't think it's out of the question. Also, it's 2mm long to be a textbook definition perfect normal on the 1.53x crop, so maybe they did it for max aperture's sake. My money is on either a f1.4 or f1.8.

**GaryM** · 11-20-2008, 11:54 AM

Originally posted by roentarre

One of the China blogs claimed it to be f1.8

Is that the same blog with the new APS-H Pentax body? I'm betting on f2, Pentax doesn't need a $1,000+ lens right now.

RaduA · 11-20-2008, 12:20 PM

Originally posted by GaryM

Is that the same blog with the new APS-H Pentax body? I'm betting on f2, Pentax doesn't need a $1,000+ lens right now.

Unless there is an official spec sheet for the next K model I don't know about I suppose their guess is as good as yours. In fact IMO their guess is better than yours

on both aspects.

Regards,
Radu

frogger · 11-20-2008, 12:42 PM

Originally posted by thePiRaTE!!

Its a DA* lens, as per the Pentax roadmap.

Ahh.. Then I'm going to go ahead and guess ~$850 and ~F2

nixcamic · 11-20-2008, 05:51 PM

Originally posted by soccerjoe5

I'd want better ISO so I can shoot low light with f/8 for more DOF

Aye, but if you go full frame, in order to maintain FOV you would loose the same amount of DOF due to the focal length change. I guess what I'm trying to say is that, people always complain about APS-C not having as good high ISO, but your using a wider angle lens then you would on FF for the same shot, so you can just open up another stop, go down a stop in ISO and have the same DOF.

(note, this doesn't mean I'm against FF, it just doesn't have as many disadvantages as people make it out to, assuming there are lenses made specially for the sensor size. However FF destroys APS-C viewfinders, if pentax makes a higher magnification viewfinder(1.5x) on their cameras I really wont care that much when/if they go FF.)

pingflood · 11-20-2008, 06:19 PM

Originally posted by AlbertSiegel

I doubt it... what does the Sigma 30mm 1.4 cost? A 30mm 1.4 DA and sub $500 price would not be out of the question.

~$400 or so. If Pentax can produce a 30 with good edge-to-edge performance they'll have something special. If not, why buy the Pentax over the Sigma?

soccerjoe5 · 11-20-2008, 11:01 PM

Originally posted by nixcamic

Aye, but if you go full frame, in order to maintain FOV you would loose the same amount of DOF due to the focal length change. I guess what I'm trying to say is that, people always complain about APS-C not having as good high ISO, but your using a wider angle lens then you would on FF for the same shot, so you can just open up another stop, go down a stop in ISO and have the same DOF.

(note, this doesn't mean I'm against FF, it just doesn't have as many disadvantages as people make it out to, assuming there are lenses made specially for the sensor size. However FF destroys APS-C viewfinders, if pentax makes a higher magnification viewfinder(1.5x) on their cameras I really wont care that much when/if they go FF.)

True on the "so you can just open up another stop, go down a stop in ISO and have the same DOF."

However it's hard even shooting at f/5.6 at clean ISOs without a flash with decent shutter speeds to freeze movement at very low light environments, such as a stage performance in a theatre.

I'm not complaining about APS-C but I am welcome to the extra clean ISO that FF can offer.

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11-20-2008, 05:27 AM	#16
soccerjoe5 Veteran Member Join Date: May 2008 Location: Philippines Photos: Gallery Posts: 1,343	Originally posted by nixcamic f1.2 would provide the same DOF as 50mm on full frame, thus killing the whole DOF argument for FF. The extra light gathering ability would also allow you to run at a lower ISO thus killing the high ISO performance aspect of FF. I'd want better ISO so I can shoot low light with f/8 for more DOF

11-20-2008, 05:29 AM	#17
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	Well the only 30mm lens Pentax had made was the K 30mm f/2.8... My wild guess is the mystery DA 30mm would be f/2.

11-20-2008, 05:40 AM	#18
Kirivon Senior Member Join Date: Sep 2007 Location: Colorado Posts: 173	Why is it that whenever lens prediction threads roll around, everyone always puts down unprecedented apertures? The fastest WA prime Pentax ever made was the M 35 f1.4. It's like when the DA 14 (f2.8) was announced and there was conversation about how neat a 14mm f1.2 would be. The best/fastest at any price/size/weight category is pretty well covered and I'm not sure that Pentax wants to start slugging it out in the 1.5-2k lens ultra-pro market. At the same time, though, I guess it's kind of boring and pointless to predict a f1.4-f2. Anyway, the fact that it's a 30 instead of a 31 suggest that the lens may not just be a transplant of the 31LTD into a weathersealed, SDM enabled housing. Optically, I think the 31LTD is one of the best lenses Pentax (or anyone) has on the market, so I'm pretty interested to see if they can improve on it. Either way, one of these lenses will be my next acquisition so I'll be following any news with interest.

11-20-2008, 06:15 AM	#19
roentarre Veteran Member Join Date: Oct 2006 Location: Melbourne, Australia Posts: 11,783	Originally posted by creampuff Well the only 30mm lens Pentax had made was the K 30mm f/2.8... My wild guess is the mystery DA 30mm would be f/2. That is the kind of nightmare i am reluctant to admit. I think it would be f2 too. Otherwise the pricing would be beyond 1500 US dollars ...

11-20-2008, 06:29 AM	#20
Albert Siegel Pentaxian Join Date: Nov 2007 Location: Tokyo Photos: Albums Posts: 372	Originally posted by roentarre That is the kind of nightmare i am reluctant to admit. I think it would be f2 too. Otherwise the pricing would be beyond 1500 US dollars ... I doubt it... what does the Sigma 30mm 1.4 cost? A 30mm 1.4 DA and sub $500 price would not be out of the question.

11-20-2008, 08:18 AM	#21
eurostar Veteran Member Join Date: Dec 2006 Location: Albareto, Italy Photos: Gallery Posts: 819	Originally posted by Kirivon Why is it that whenever lens prediction threads roll around, everyone always puts down unprecedented apertures? The fastest WA prime Pentax ever made was the M 35 f1.4. But this 30 is an APS-C normal lens, not a wideangle. Expecting a F 1,4 aperture, and a relatively cheap price, is not outlandish.

11-20-2008, 09:15 AM	#22
frogger Senior Member Join Date: Jan 2008 Location: Toronto, ON, CA Posts: 162	Originally posted by thePiRaTE!! 10% side consideration: Pentax still do a good business on the FA31. If they make this lens 1mm wider and equally as fast (not that f2 makes a big difference) then they eclipse the FA. If its 30/2, its still respectable, predictable, will still have all modern weather proofing/SDM amenities yet leaving the mystique of the FA intact. I would guess its not going to have weather proofing unless its a DA* lense? In which case it could be relatively pricey like the DA*55mm.

11-20-2008, 10:22 AM	#23
thePiRaTE!! Inactive Account Join Date: Sep 2007 Location: Calgary, AB Photos: Gallery Posts: 942	Originally posted by frogger I would guess its not going to have weather proofing unless its a DA* lense? In which case it could be relatively pricey like the DA55mm. Its a DA lens, as per the Pentax roadmap.

11-20-2008, 11:32 AM	#24
Kirivon Senior Member Join Date: Sep 2007 Location: Colorado Posts: 173	Originally posted by eurostar But this 30 is an APS-C normal lens, not a wideangle. Expecting a F 1,4 aperture, and a relatively cheap price, is not outlandish. Yes, I was referring more to the f1.2 comment. Given the DA* 55 is about as big as the sigma 30 1.4 I don't think it's out of the question. Also, it's 2mm long to be a textbook definition perfect normal on the 1.53x crop, so maybe they did it for max aperture's sake. My money is on either a f1.4 or f1.8.

11-20-2008, 11:54 AM	#25
GaryM Site Supporter Join Date: Mar 2008 Location: Montclair, CA Photos: Gallery Posts: 426	Originally posted by roentarre One of the China blogs claimed it to be f1.8 Is that the same blog with the new APS-H Pentax body? I'm betting on f2, Pentax doesn't need a $1,000+ lens right now.

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11-20-2008, 12:20 PM	#26
RaduA Guest	Originally posted by GaryM Is that the same blog with the new APS-H Pentax body? I'm betting on f2, Pentax doesn't need a $1,000+ lens right now. Unless there is an official spec sheet for the next K model I don't know about I suppose their guess is as good as yours. In fact IMO their guess is better than yours on both aspects. Regards, Radu

11-20-2008, 12:42 PM	#27
frogger Senior Member Join Date: Jan 2008 Location: Toronto, ON, CA Posts: 162	Originally posted by thePiRaTE!! Its a DA* lens, as per the Pentax roadmap. Ahh.. Then I'm going to go ahead and guess ~$850 and ~F2

11-20-2008, 05:51 PM	#28
nixcamic Veteran Member Join Date: Jun 2008 Location: Guatemala Posts: 354	Originally posted by soccerjoe5 I'd want better ISO so I can shoot low light with f/8 for more DOF Aye, but if you go full frame, in order to maintain FOV you would loose the same amount of DOF due to the focal length change. I guess what I'm trying to say is that, people always complain about APS-C not having as good high ISO, but your using a wider angle lens then you would on FF for the same shot, so you can just open up another stop, go down a stop in ISO and have the same DOF. (note, this doesn't mean I'm against FF, it just doesn't have as many disadvantages as people make it out to, assuming there are lenses made specially for the sensor size. However FF destroys APS-C viewfinders, if pentax makes a higher magnification viewfinder(1.5x) on their cameras I really wont care that much when/if they go FF.)

11-20-2008, 06:19 PM	#29
pingflood Veteran Member Join Date: Jun 2008 Location: Borås, Sweden Photos: Gallery Posts: 3,169	Originally posted by AlbertSiegel I doubt it... what does the Sigma 30mm 1.4 cost? A 30mm 1.4 DA and sub $500 price would not be out of the question. ~$400 or so. If Pentax can produce a 30 with good edge-to-edge performance they'll have something special. If not, why buy the Pentax over the Sigma?

11-20-2008, 11:01 PM	#30
soccerjoe5 Veteran Member Join Date: May 2008 Location: Philippines Photos: Gallery Posts: 1,343	Originally posted by nixcamic Aye, but if you go full frame, in order to maintain FOV you would loose the same amount of DOF due to the focal length change. I guess what I'm trying to say is that, people always complain about APS-C not having as good high ISO, but your using a wider angle lens then you would on FF for the same shot, so you can just open up another stop, go down a stop in ISO and have the same DOF. (note, this doesn't mean I'm against FF, it just doesn't have as many disadvantages as people make it out to, assuming there are lenses made specially for the sensor size. However FF destroys APS-C viewfinders, if pentax makes a higher magnification viewfinder(1.5x) on their cameras I really wont care that much when/if they go FF.) True on the "so you can just open up another stop, go down a stop in ISO and have the same DOF." However it's hard even shooting at f/5.6 at clean ISOs without a flash with decent shutter speeds to freeze movement at very low light environments, such as a stage performance in a theatre. I'm not complaining about APS-C but I am welcome to the extra clean ISO that FF can offer.