New zoom 70-200 F4

Kunzite · 03-10-2019, 07:45 AM - **1 Like**

Always confusing things. That's "equivalence"!

nocturnal · 03-10-2019, 08:12 AM - **1 Like**

Let's get away from all that. I could only find a couple of good photos of the 60-250 on K1, only lots of vignette tests. So if someone knows a secret album of glorious photos let me know.

**c.a.m** · 03-10-2019, 08:30 AM

Originally posted by lytrytyr

Fact-checking our thread's misinformation yesterday, I came across this gem:"It provides a zoom ratio of approximately 2.9 times to cover a telephoto range from 107mm to 307mm in the 35mm format."

Good spotting!

That's a strange statement, for sure. I'm at a loss to understand what Ricoh might have meant. They might have meant something like "This lens provides the same field of view on an APS-C format camera as a 107-307mm lens would on a K-1," but that would be getting too complicated -- and unnecessary in the context of a D FA* lens.

Weird.

- Craig

Kunzite · 03-10-2019, 08:33 AM

What it means is that they wrote the text before releasing the K-1

Andrea K · 03-10-2019, 10:16 AM

Originally posted by RonHendriks1966

Finding things is not easy. As far as I know 60-250 has aero bright 1.

Pentax Coatings: Ghostless, SP & Aero Bright - PentaxForums.com

NO. First and only DA* lens with ABC was and is the 55mm f/1,4

nocturnal · 03-10-2019, 12:22 PM

Originally posted by Andrea K

NO. First and only DA* lens with AB was and is the 55mm f/1,4

Where does this info come from? Not according to PF database anyhow... Both the DA* 55 and 60-250 have SMC/SP coatings?

I always thought Aerobright was a newer technology than DA* 55 and 60-250 anyway.

Kunzite · 03-10-2019, 12:32 PM

The DA* 55mm f/1.4 is using Aero Bright Coating together with SMC (ABC is never used on its own, as it's too fragile for the exposed elements).
smc PENTAX-DA?55mmF1.4 SDM / Telephoto Lenses / K-mount Lenses / Lenses / Products | RICOH IMAGING

nocturnal · 03-10-2019, 01:10 PM

Originally posted by Kunzite

The DA* 55mm f/1.4 is using Aero Bright Coating together with SMC (ABC is never used on its own, as it's too fragile for the exposed elements).
smc PENTAX-DA?55mmF1.4 SDM / Telephoto Lenses / K-mount Lenses / Lenses / Products | RICOH IMAGING

No mention of Aerobright for the 60-250 on the Ricoh website. How would you even know it is used in certain lenses? Could be a con 😀, at least with the HD coat it is easy to see it works and the colours are so natural/saturated etc.

Mistral75 · 03-10-2019, 01:55 PM

Apparently the DA☆ 55mm f/1.4 is using Aero Bright Coating and the DA☆ 60-250mm f/4 is not.

Pentax announces two DA Star lenses: Digital Photography Review

**JensE** · 03-10-2019, 03:01 PM - **4 Likes**

The lenses and accessories catalog has tags at each lens for the coating technologies. It also has a section explaining them, including transmission curves. Not sure if I linked the latest version, but the lenses discussed above are included.

**Rondec** · 03-11-2019, 02:47 AM

Originally posted by JensE

The lenses and accessories catalog has tags at each lens for the coating technologies. It also has a section explaining them, including transmission curves. Not sure if I linked the latest version, but the lenses discussed above are included.

It is interesting that according to this, the DFA 24-70 and 15-30 use Pentax's own HD coating and not Tamron's coatings.

nocturnal · 03-11-2019, 03:03 AM - **1 Like**

Originally posted by Rondec

It is interesting that according to this, the DFA 24-70 and 15-30 use Pentax's own HD coating and not Tamron's coatings.

It is a big plus over Tamron coatings, HD coating is brilliant, apparently according to the transmission curves Aerobright is even better. Pentax were always at the forefront making the best lens coatings.

Sandy Hancock · 03-11-2019, 03:39 AM

Originally posted by Rondec

It is interesting that according to this, the DFA 24-70 and 15-30 use Pentax's own HD coating and not Tamron's coatings.

I thought that was common knowledge from the day these two lenses were announced.

Andrea K · 03-11-2019, 04:39 AM

Originally posted by JensE

The lenses and accessories catalog has tags at each lens for the coating technologies. It also has a section explaining them, including transmission curves. Not sure if I linked the latest version, but the lenses discussed above are included.

This.

The japan version is updated with latest lenses: http://www.ricoh-imaging.co.jp/japan/support/catalog/pdf/lenses_accessories.pdf ... but it isn't in english

**Rondec** · 03-11-2019, 05:40 AM - **1 Like**

Originally posted by Sandy Hancock

I thought that was common knowledge from the day these two lenses were announced.

I guess I have just read to many Pentax bashers saying that these lenses are just straight Tamron rebadges. Of course, they are probably the same people who claim that about every new Pentax lens that is announced...

03-10-2019, 10:16 AM	#170
Andrea K Pentaxian Join Date: Mar 2009 Location: Rome, Italy Posts: 822	Originally posted by RonHendriks1966 Finding things is not easy. As far as I know 60-250 has aero bright 1. Pentax Coatings: Ghostless, SP & Aero Bright - PentaxForums.com NO. First and only DA* lens with ABC was and is the 55mm f/1,4 Last edited by Andrea K; 03-11-2019 at 04:29 AM.

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03-10-2019, 07:45 AM - 1 Like	#166
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Always confusing things. That's "equivalence"!

03-10-2019, 08:12 AM - 1 Like	#167
nocturnal Veteran Member Join Date: Dec 2012 Photos: Gallery Posts: 505	Let's get away from all that. I could only find a couple of good photos of the 60-250 on K1, only lots of vignette tests. So if someone knows a secret album of glorious photos let me know.

03-10-2019, 08:30 AM	#168
c.a.m Site Supporter Join Date: Jan 2013 Location: Ottawa, Canada Photos: Gallery \| Albums Posts: 4,188	Originally posted by lytrytyr Fact-checking our thread's misinformation yesterday, I came across this gem:"It provides a zoom ratio of approximately 2.9 times to cover a telephoto range from 107mm to 307mm in the 35mm format." Good spotting! That's a strange statement, for sure. I'm at a loss to understand what Ricoh might have meant. They might have meant something like "This lens provides the same field of view on an APS-C format camera as a 107-307mm lens would on a K-1," but that would be getting too complicated -- and unnecessary in the context of a D FA* lens. Weird. - Craig

03-10-2019, 08:33 AM	#169
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	What it means is that they wrote the text before releasing the K-1

03-10-2019, 12:22 PM	#171
nocturnal Veteran Member Join Date: Dec 2012 Photos: Gallery Posts: 505	Originally posted by Andrea K NO. First and only DA* lens with AB was and is the 55mm f/1,4 Where does this info come from? Not according to PF database anyhow... Both the DA* 55 and 60-250 have SMC/SP coatings? I always thought Aerobright was a newer technology than DA* 55 and 60-250 anyway.

03-10-2019, 12:32 PM	#172
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	The DA* 55mm f/1.4 is using Aero Bright Coating together with SMC (ABC is never used on its own, as it's too fragile for the exposed elements). smc PENTAX-DA?55mmF1.4 SDM / Telephoto Lenses / K-mount Lenses / Lenses / Products \| RICOH IMAGING

03-10-2019, 01:10 PM	#173
nocturnal Veteran Member Join Date: Dec 2012 Photos: Gallery Posts: 505	Originally posted by Kunzite The DA* 55mm f/1.4 is using Aero Bright Coating together with SMC (ABC is never used on its own, as it's too fragile for the exposed elements). smc PENTAX-DA?55mmF1.4 SDM / Telephoto Lenses / K-mount Lenses / Lenses / Products \| RICOH IMAGING No mention of Aerobright for the 60-250 on the Ricoh website. How would you even know it is used in certain lenses? Could be a con 😀, at least with the HD coat it is easy to see it works and the colours are so natural/saturated etc.

03-10-2019, 01:55 PM	#174
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,526	Apparently the DA☆ 55mm f/1.4 is using Aero Bright Coating and the DA☆ 60-250mm f/4 is not. Pentax announces two DA Star lenses: Digital Photography Review

03-10-2019, 03:01 PM - 4 Likes	#175
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,964	The lenses and accessories catalog has tags at each lens for the coating technologies. It also has a section explaining them, including transmission curves. Not sure if I linked the latest version, but the lenses discussed above are included.

03-11-2019, 02:47 AM	#176
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,650	Originally posted by JensE The lenses and accessories catalog has tags at each lens for the coating technologies. It also has a section explaining them, including transmission curves. Not sure if I linked the latest version, but the lenses discussed above are included. It is interesting that according to this, the DFA 24-70 and 15-30 use Pentax's own HD coating and not Tamron's coatings.

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03-11-2019, 03:03 AM - 1 Like	#177
nocturnal Veteran Member Join Date: Dec 2012 Photos: Gallery Posts: 505	Originally posted by Rondec It is interesting that according to this, the DFA 24-70 and 15-30 use Pentax's own HD coating and not Tamron's coatings. It is a big plus over Tamron coatings, HD coating is brilliant, apparently according to the transmission curves Aerobright is even better. Pentax were always at the forefront making the best lens coatings.

03-11-2019, 03:39 AM	#178
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,267	Originally posted by Rondec It is interesting that according to this, the DFA 24-70 and 15-30 use Pentax's own HD coating and not Tamron's coatings. I thought that was common knowledge from the day these two lenses were announced.

03-11-2019, 04:39 AM	#179
Andrea K Pentaxian Join Date: Mar 2009 Location: Rome, Italy Posts: 822	Originally posted by JensE The lenses and accessories catalog has tags at each lens for the coating technologies. It also has a section explaining them, including transmission curves. Not sure if I linked the latest version, but the lenses discussed above are included. This. The japan version is updated with latest lenses: http://www.ricoh-imaging.co.jp/japan/support/catalog/pdf/lenses_accessories.pdf ... but it isn't in english

03-11-2019, 05:40 AM - 1 Like	#180
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,650	Originally posted by Sandy Hancock I thought that was common knowledge from the day these two lenses were announced. I guess I have just read to many Pentax bashers saying that these lenses are just straight Tamron rebadges. Of course, they are probably the same people who claim that about every new Pentax lens that is announced...