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11-03-2017, 04:37 PM   #1981
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It's not a macro lens, since it has been announced as ultra wide angle zoom lens on the roadmap.
ALso a macro zoom makes no sense, especially at this short focal length.

11-03-2017, 04:40 PM   #1982
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yaotomicamera said:
I want to sell it as a starlit lens and things with things
High resolution and high performance from opening of the diaphragm were also introduced as "starlit lens"
High-performance lens in which the point source at the periphery appears as a point
In other words, it is expected to be a fabulous lens with extremely reduced aberrations
I hear a story that considering the installation of "dew condensation prevention heater" to support it
11-03-2017, 04:47 PM   #1983
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QuoteOriginally posted by OoKU Quote
I want to sell it as a starlit lens and things with things
"Starlit" I think I understand, but "things with things?"
QuoteOriginally posted by OoKU Quote
I hear a story that considering the installation of "dew condensation prevention heater" to support it
Perfect, a rear window defroster for my lens( or in Ford Motor Company parlance, electrically heated backlight). Will the metal conducting lines be visible in photos?
11-03-2017, 05:34 PM   #1984
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QuoteOriginally posted by RGlasel Quote
"Starlit" I think I understand, but "things with things?"Perfect, a rear window defroster for my lens( or in Ford Motor Company parlance, electrically heated backlight). Will the metal conducting lines be visible in photos?
Do not mind,it's translate from Japanese by google.


11-03-2017, 07:52 PM   #1985
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QuoteOriginally posted by OoKU Quote
yaotomicamera said:
I want to sell it as a starlit lens and things with things
High resolution and high performance from opening of the diaphragm were also introduced as "starlit lens"
High-performance lens in which the point source at the periphery appears as a point
In other words, it is expected to be a fabulous lens with extremely reduced aberrations
I hear a story that considering the installation of "dew condensation prevention heater" to support it
Ooku - I read this two, but I could not understand whether "starlit" is referring to:

A) The fact that it is part of the DA star series, and the high quality that implies
B) The suitability of the lens for taking images of stars
A&B) The writer is doing a kind of word-play on both of the above
11-03-2017, 08:48 PM   #1986
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I think they just mean it is a fast UWA for taking star/nightsky astrophotography.
11-03-2017, 10:46 PM   #1987
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I think you are probably right, and they are positioning this lens as the ideal companion for Astrotracer.

In the light of Yaotomi’s comment, it would be very interesting if the mystery switch on the lens turned out to be an on/off switch for an integrated heating element to prevent condensation on the lens.
11-04-2017, 12:24 AM   #1988
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QuoteOriginally posted by JPT Quote
I think you are probably right, and they are positioning this lens as the ideal companion for Astrotracer.

In the light of Yaotomi’s comment, it would be very interesting if the mystery switch on the lens turned out to be an on/off switch for an integrated heating element to prevent condensation on the lens.
Right, would make sense to relate to astrophotography, with high corrections. I guess the used phrasing is too explicit as to have been just a strange translation of "stellar".
However, I'm really looking forward to this lens, well corrected wideangle would have been the only pull factor for me to look at FF, but this could be now the perfect company with my KP.

11-04-2017, 12:54 AM   #1989
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There is a fresh thread about the 25 F4 for 645, it has a similar slop on the side which is for inserting a filter; what a cool feature.
11-04-2017, 01:04 AM   #1990
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QuoteOriginally posted by biz-engineer Quote
There is a fresh thread about the 25 F4 for 645, it has a similar slop on the side which is for inserting a filter; what a cool feature.
interesting if they can do that while retaining AW designation (I know that's covered too, but it's the norm for D* lenses)
11-04-2017, 01:11 AM   #1991
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QuoteOriginally posted by JPT Quote
Ooku - I read this two, but I could not understand whether "starlit" is referring to:

A) The fact that it is part of the DA star series, and the high quality that implies
B) The suitability of the lens for taking images of stars
A&B) The writer is doing a kind of word-play on both of the above
I think it is the sky photography.
11-04-2017, 02:21 AM   #1992
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QuoteOriginally posted by ffking Quote
interesting if they can do that while retaining AW designation (I know that's covered too, but it's the norm for D* lenses)
The DFA/DA645 *25/4 was AW (as any star lens) and had the filter drawer so yes, that's possible.

DA560 also is AW and has a filter drawer.

Last edited by thibs; 11-04-2017 at 02:48 AM.
11-04-2017, 02:36 AM   #1993
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Sigma Art - filter size 77 mm
dimensions 85.4 x 99.9 mm weight 815 g

DFA*50/1.4 is heavier than 815 g and longer than 100 mm....

72 mm filter is the same as Nikkor 58/1.4 G and Canon 50/1.2
11-04-2017, 03:27 AM - 1 Like   #1994
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QuoteOriginally posted by ogl Quote
DFA*50/1.4 is heavier than 815 g and longer than 100 mm....
The weight will be a result of the number of glass elements and metal components (i.e. "build quality"). The length will be largely dictated by the optical formula.

Those who have a genuine use for this lens won't be concerned about the weight or length

Last edited by BigMackCam; 11-04-2017 at 03:51 AM.
11-04-2017, 04:34 AM   #1995
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QuoteOriginally posted by BigMackCam Quote
The weight will be a result of the number of glass elements and metal components (i.e. "build quality"). The length will be largely dictated by the optical formula.

Those who have a genuine use for this lens won't be concerned about the weight or length
I have a use for this lens and I am concerned about length, weight and filter diameter. The 85 will be even bigger that is my major concern.
Do we have any clear information about dimensions yet? It looks big.

---------- Post added 04-11-17 at 12:43 PM ----------

QuoteOriginally posted by photoptimist Quote
Aqueducts! Beautiful pixelshift photos of aqueducts!

(Now I'm pining for the fjords where this lens might be useful.)
Don't forget the roads, pictures of roads.
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