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Forum: Pentax News and Rumors 10-03-2018, 03:30 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
You're welcome. I bet that Russian will be honored if you ever decide to take the plunge on that slim filter. :)
Forum: Pentax News and Rumors 10-03-2018, 03:12 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
My point was about lenses with short registration distances. Wide angle, rangefinder M39 and the like like you mentioned. Falloff is just physics and solving that is no easy task. Such a lens without vignetting would have to be brighter in the corners than in the center. Essentially having an in built center filter or something like an inverse apodisation filter. Maybe tinting a convex element could solve the problem. But then an f/4 lens would become f/8 (or rather T 8) or something like that.
As a side note, I read about that issue and that using a thinner sensor filter considerably mitigates the problem. I think kolarivision has that service for Sony, if you're ever interested in a thin filter conversion.

EDIT: Sorry, there's been a mix up. You were mentioning few were still convinced there's a weight advantage. That was my point too. It's the reason I mentioned the 645Z.

Size advantage is clearly there, but only if you use the lenses with the shorter registration distances.
Forum: Pentax News and Rumors 10-03-2018, 01:14 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
That's not the case for $$ony, for example, since the mount is so narrow that lenses require special designs to overcome that limitation and the weight advantage isn't that considerable.
But if you're comparing the 645z with the available mirrorless options, there is a huge difference in weight and size.
Forum: Pentax News and Rumors 10-03-2018, 10:11 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
It should be, since the rear element is so close to the sensor/image plane. The inverse square law takes its toll on mirrorless. Not so much on retrofocus designs.
The same happens on large format ultra wide angle lenses and is the reason for using center filters.
Forum: Pentax News and Rumors 06-28-2018, 03:38 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
I wouldn't mind having the option to buy a tripod foot for this lens. Specially for its size and weight matching that of the camera.

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Forum: Pentax News and Rumors 06-28-2018, 03:23 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
Filter size depends on design, not on quantity of glass and is not reflective of IQ. We can see that in the lens database. Some Pentax redesigns have smaller filters and are better corrected than their predecessors.

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Forum: Pentax News and Rumors 06-27-2018, 10:06 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
Zeiss Otus: 970g (F mount) 1030g (EF mount)
Sigma ART: 815g (EF & F)
Pentax D FA*: 830g approx. (According to Pentax rumors)

So it sits a little above the Sigma. The Otus is all metal I guess being around 1kg.

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Forum: Pentax News and Rumors 06-27-2018, 04:14 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
Is there any bigger or heavier 50/1.4 around?

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Forum: Pentax News and Rumors 06-21-2018, 01:26 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
That would be some nice birthday news!

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Forum: Pentax News and Rumors 05-18-2018, 01:07 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
Hmm, ok didn't know that, but the 70-200 G2 has so many similarities…
Sorry for the confusion.

As for the price, putting it over 1k would leave them at an disadvantage over Sigma. Just consider for a moment not what it's worth for you or me, or as pentaxians, but the options available in the third party manufacturer market for all the different DSLR camera mounts.

Consider this: is really an advantage of AF over one lens maker and WR over another really worth that price difference?

I really hope you guys are right, and that this is going to reflect on good income for Pentax through the licensing of the design and allow them to develop many more lenses in the future.

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Forum: Pentax News and Rumors 05-18-2018, 12:52 PM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
Fair price? What is a fair price? Pricing depends much more on brand name than anything else.
Buying a Tokina Opera at the same price point as a Zeiss Milvus gives you AF, but it's not gonna hold up its value in time like the latter. A reason for that is reputation. And Zeiss has one of coming close to optical perfection. Also, it would be the reason for them being able of demanding a high price.
Next, the previous two have a WR design, so perhaps there won't be a huge price difference between the Tokina and Pentax versions.
As for comparing it with Sigma, even if the image quality is the same, it would have to be around $950 with weather sealing and all, because else it would become a niche product since not everyone needs or expects to have WR. It's just a product of which not enough copies are going to be sold to justify the manufacturing process.
I'm not saying I'm unwilling to pay for a product in that price range, I'm just in the position of seeing it as a tough sell.
I guess they can put the price they want for the Pentax version since it's already a niche market because there aren't too many competitors (but it's also not like Tamron's versions which don't have WR ergo the higher tag on the Px's), but for a third party manufacturer like Tokina, it's not a product easy to position in this particular market.
I'm just saying it's gonna be price since the options are so limited.


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Forum: Pentax News and Rumors 05-18-2018, 11:07 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
Tokina? I thought it would be a Tamron like the 15-30, 24-70, 70-200 and 150-450.
Hmm, now I see the Tokina Opera…
Why not $800ish? There's certainly a void in that price range.

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Forum: Pentax News and Rumors 05-18-2018, 10:28 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
This lens needs to be in the US$800 range. Why?
There is a gap in price range that they should take advantage of between a normal 1.4 AF lens and other, more highly corrected or faster lenses like the Sigma ART which goes for roughly $950 ($100 less on sale). Canon 1.2 goes for $1300 and the Zeiss Milvus $1200-$1300. The Sony Planar T* goes for $1500 (the manual version in other mounts goes for $725).
In order for the Tamron version to stay competitive it has to be an absolute better performer than at least the Sigma wide open, or if equal, lower priced and better construction (not as plasticky). This is to create momentum by being the better option price and performance wise. Rokinon 1.2 at $1000 is an example of lower price competition on Canon, but manual focus only and can't say anything about its optical performance, although the Canon itself has mixed reviews (the 85/1.2 seems to be the undisputable performer).
After that it's expected that the Pentax version be $200 more because of the weather sealing, so we would end up with a $1000 lens.
The market here is very crowded and therefore it has to be an outstanding lens (more so because of the * designation if Pentax doesn't want it to become meaningless in the future). I see this as an opportunity for both brands to show their outperforming optics, craftsmanship, quality and technology. If it's a breakthrough lens they could even benefit from selling it at a loss.
If the price is really going to be up there it would have to be a stellar piece of glass with a lot going for it in many areas like all of the following:
• Great for portraits with beautiful projection and OOF highlights.
• Highly absent of coma and astigmatism for astro (part of landscape which is a strong point for Pentax).
• Close focusing.
• Great sunstars and city lights at night at smaller apertures and rounded at wider ones (balance between portraits and landscape again).
• No distortion (rectilinear projection). which shouldn't be a problem specially at this focal range.
• No axial CA.

- Field curvature doesn't bother me nor should it anyone since it's not a macro lens nor should it be used for repro work. The only time I'm photographing anything like a flat test chart or a wall is an actual graffiti on a wall, and stopping down just solves that since it's not going anywhere, and I'm actually the one inducing motion blur at those settings.
- Transverse (lateral) CA is easy to correct in camera or post.

As for AF, it should be responsive enough for even the most advanced systems to date and in case Pentax ever decided to up it's game in that area in the next generation of bodies.

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Forum: Pentax News and Rumors 04-17-2018, 08:59 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
That is true. That rear element with the cutout for the contacts is a unique thing. Canon did for certain take advantage of that wider bayonet mount (a thing I see that's very limiting to Nikon) with that particular lens. Instant collectible. That's what I was rooting for.

And yes, that lens is also from the film era. That's why I was toying with the idea of a modern version. Also, the AF system would have to be groundbreaking (including face recognition and particularly eye recognition) and nail perfect focus on eyes each and every time at that shallow of a depth of field .

1.4 will be enough if it's usable from wide open, which I'm sure it will be. I have the FA and it's best at f/4. Otherwise it works good on film, b&w and for cheesy soft portraits. I guess that's a look pixel peepers have nightmares over.

Even a 1.2 would've been stretching things too far. Also matching a price tag of 1300 USD, too. I wonder if this new lens will be in the sub 1k or even sub 800 category. Any info on that?

Talking about lenses available now, I wonder if anyone has had a chance to play with those hugely expensive (for a triplet design and not very wide aperture, all manual) from the reborn Meyer-Optik Görlitz. Their appeal must be their projection and rendering.

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Forum: Pentax News and Rumors 04-17-2018, 07:22 AM  
Development update regarding the HD PENTAX-D FA★50mmF1.4 SDM AW
Posted By torashi
Replies: 734
Views: 72,879
I bet Pentax would gather a lot of good attention if they were to release a 50/1.0 like Canon did a few decades ago.

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