what will the 31/55/77 be like on FF?

Conqueror · 02-20-2016, 03:47 AM

what will the 31/55/77 be like on FF?

trying to understand how these might work on FF - what they will be similar to... (the resultant FOV mainly)

imagine border sharpness might be down a bit on the 55 and 77.. may not be a big deal though

**clackers** · 02-20-2016, 04:18 AM

Well, the 31 and 77 were designed as 35mm lenses, while the 55 works on FF - see other threads, including photos.

For FoV comparisons to other lenses you might have, divide by 1.5. ☺

**RobA_Oz** · 02-20-2016, 04:34 AM

Originally posted by clackers

Well, the 31 and 77 were designed as 35mm lenses, while the 55 works on FF - see other threads, including photos.

For FoV comparisons to other lenses you might have, divide by 1.5. ☺

Of course, the situation will be more complex than just "this lens on FF looks like that lens on APS-C". Depending on your subject, you'll be either standing at the same point and wondering at the extra real estate on a landscape shot or standing at a different point to frame your subject similarly and wondering at how different the background looks.

The latter, I imagine, is part of the reason some people look a little askance at the aperture equivalence argument in debates about the differences between the two formats.

Apapukas · 02-20-2016, 04:35 AM

I wouldn't have my hopes very high when it comes to mounting "amigos" on a K1. It is a 36mp FF sensor after all that requires that best glass to to show its full potential.

As good as the amigos are, they were not exactly designed to be used on digital FF with an ultra high resolution sensor.

hsteeves · 02-20-2016, 05:28 AM

Originally posted by Apapukas

I wouldn't have my hopes very high when it comes to mounting "amigos" on a K1. It is a 36mp FF sensor after all that requires that best glass to to show its full potential.

As good as the amigos are, they were not exactly designed to be used on digital FF with an ultra high resolution sensor.

Although there have been some early positive posts about the use of at least the 31 and 77 on the K1, at the end of the day, we will have to wait until the camera is out in the community to get a real feel for it.

pid · 02-20-2016, 05:39 AM

there is no need to have any concerns abut the IQ of the three amigos (FA Limiteds) when using them with the new K-1! There are a lot results you can see in this Forum in the Lens clubs: Pentax Lenses on FF Club ( https://www.pentaxforums.com/forums/122-lens-clubs/247282-pentax-lenses-ff-club.html ). These beauties will shine on the K-1 ... you will see soon.

**clackers** · 02-20-2016, 05:43 AM - **2 Likes**

Originally posted by Apapukas

As good as the amigos are, they were not exactly designed to be used on digital FF with an ultra high resolution sensor.

The K-3 has a higher resolution and they're fine. ☺

Sandy Hancock · 02-20-2016, 06:19 AM

Short answer? Fantastic.

Apapukas · 02-20-2016, 06:55 AM

Originally posted by clackers

The K-3 has a higher resolution and they're fine. ☺

I understand.

But there are numerous articles about "New sensors demanding new ultra high quality lenses". Is it just a marketing strategy put by camera manufacturers?

Also, DxO stated that some DA lenses are not capable of reaching the full potential of K3 sensor.

sunny16 · 02-20-2016, 06:55 AM - **1 Like**

As others say... I have used them on a Sony A7r and they look just fine. Which is why I don't really get some of the quips by sites like DPReview where they question how "all these ANCIENT Pentax lenses will hold up" as if some people haven't already been using every single one of them adapted to either full frame mirrorless or even on Canon full frame.

**Digitalis** · 02-20-2016, 07:10 AM - **1 Like**

Originally posted by Apapukas

It is a 36mp FF sensor after all that requires that best glass to to show its full potential.

It has the same pixel density of a K5IIs, and the FA limited, FA* and older K series lenses are still chomping at the bit with that camera.

Nicolas06 · 02-20-2016, 08:55 AM

Originally posted by Conqueror

what will the 31/55/77 be like on FF?

trying to understand how these might work on FF - what they will be similar to... (the resultant FOV mainly)

imagine border sharpness might be down a bit on the 55 and 77.. may not be a big deal though

Well its easy really, the 77 on the FF will behave rougly in term of field of view like the 55 today on APSC. The 55 himself on FF will behave rougly like the 31 today (more like a 35mm in fact). The 31mm will behave like a DA21 today.

You could consider buying a DFA100 macro or a used F/FA 135 to approximate the reach the FA77 has on APSC with the new K1 FF. The math say 77x1.5 = 115.5, right between the 100 macro and the F/FA 135.

Conqueror · 02-20-2016, 09:25 AM

Originally posted by Nicolas06

Well its easy really, the 77 on the FF will behave rougly in term of field of view like the 55 today on APSC. The 55 himself on FF will behave rougly like the 31 today (more like a 35mm in fact). The 31mm will behave like a DA21 today.

You could consider buying a DFA100 macro or a used F/FA 135 to approximate the reach the FA77 has on APSC with the new K1 FF. The math say 77x1.5 = 115.5, right between the 100 macro and the F/FA 135.

Ah thanks... I'm not fond of the FL of the 55 on APSC... but when it become ~35 on FF ... well that is ideal, 30-35 probably my favorite FL

It was the 55 in particular I was wondering about... sometimes think about selling it..

Nicolas06 · 02-20-2016, 09:35 AM

You are welcome... But that mean if you choose to migrate to the FF, that the 77 will match the 55 field of view you are not found of on APSC.

I can really understand you, I don't like 50-55 much myself and if I had 2 primes in the bags, that would be 21 and 77. Add a third and that would be the 35ltd.

**gofour3** · 02-20-2016, 11:34 AM

Originally posted by Conqueror

what will the 31/55/77 be like on FF?

trying to understand how these might work on FF - what they will be similar to... (the resultant FOV mainly)

imagine border sharpness might be down a bit on the 55 and 77.. may not be a big deal though

You'll probably find that 31mm is not wide enough on FF and 77mm is not long enough. (28mm and 85mm are my favorites on film)

I my books the FA43 will be the most useful of the FA Ltds on FF.

Phil.

02-20-2016, 03:47 AM	#1
Conqueror Veteran Member Join Date: Dec 2011 Location: UK Posts: 440	what will the 31/55/77 be like on FF? what will the 31/55/77 be like on FF? trying to understand how these might work on FF - what they will be similar to... (the resultant FOV mainly) imagine border sharpness might be down a bit on the 55 and 77.. may not be a big deal though

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02-20-2016, 04:18 AM	#2
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Well, the 31 and 77 were designed as 35mm lenses, while the 55 works on FF - see other threads, including photos. For FoV comparisons to other lenses you might have, divide by 1.5. ☺

02-20-2016, 04:34 AM	#3
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,195	Originally posted by clackers Well, the 31 and 77 were designed as 35mm lenses, while the 55 works on FF - see other threads, including photos. For FoV comparisons to other lenses you might have, divide by 1.5. ☺ Of course, the situation will be more complex than just "this lens on FF looks like that lens on APS-C". Depending on your subject, you'll be either standing at the same point and wondering at the extra real estate on a landscape shot or standing at a different point to frame your subject similarly and wondering at how different the background looks. The latter, I imagine, is part of the reason some people look a little askance at the aperture equivalence argument in debates about the differences between the two formats.

02-20-2016, 04:35 AM	#4
Apapukas Inactive Account Join Date: Oct 2012 Location: Lietuva, Vilnius Posts: 627	I wouldn't have my hopes very high when it comes to mounting "amigos" on a K1. It is a 36mp FF sensor after all that requires that best glass to to show its full potential. As good as the amigos are, they were not exactly designed to be used on digital FF with an ultra high resolution sensor.

02-20-2016, 05:28 AM	#5
hsteeves Senior Member Join Date: Feb 2010 Location: Saskatchewan Posts: 256	Originally posted by Apapukas I wouldn't have my hopes very high when it comes to mounting "amigos" on a K1. It is a 36mp FF sensor after all that requires that best glass to to show its full potential. As good as the amigos are, they were not exactly designed to be used on digital FF with an ultra high resolution sensor. Although there have been some early positive posts about the use of at least the 31 and 77 on the K1, at the end of the day, we will have to wait until the camera is out in the community to get a real feel for it.

02-20-2016, 05:39 AM	#6
pid Pentaxian Join Date: Jan 2010 Photos: Gallery Posts: 567	there is no need to have any concerns abut the IQ of the three amigos (FA Limiteds) when using them with the new K-1! There are a lot results you can see in this Forum in the Lens clubs: Pentax Lenses on FF Club ( https://www.pentaxforums.com/forums/122-lens-clubs/247282-pentax-lenses-ff-club.html ). These beauties will shine on the K-1 ... you will see soon.

02-20-2016, 05:43 AM - 2 Likes	#7
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by Apapukas As good as the amigos are, they were not exactly designed to be used on digital FF with an ultra high resolution sensor. The K-3 has a higher resolution and they're fine. ☺

02-20-2016, 06:19 AM	#8
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,267	Short answer? Fantastic.

02-20-2016, 06:55 AM	#9
Apapukas Inactive Account Join Date: Oct 2012 Location: Lietuva, Vilnius Posts: 627	Originally posted by clackers The K-3 has a higher resolution and they're fine. ☺ I understand. But there are numerous articles about "New sensors demanding new ultra high quality lenses". Is it just a marketing strategy put by camera manufacturers? Also, DxO stated that some DA lenses are not capable of reaching the full potential of K3 sensor.

02-20-2016, 06:55 AM - 1 Like	#10
sunny16 Veteran Member Join Date: Oct 2010 Location: Maryland, USA Photos: Albums Posts: 309	As others say... I have used them on a Sony A7r and they look just fine. Which is why I don't really get some of the quips by sites like DPReview where they question how "all these ANCIENT Pentax lenses will hold up" as if some people haven't already been using every single one of them adapted to either full frame mirrorless or even on Canon full frame.

02-20-2016, 07:10 AM - 1 Like	#11
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by Apapukas It is a 36mp FF sensor after all that requires that best glass to to show its full potential. It has the same pixel density of a K5IIs, and the FA limited, FA* and older K series lenses are still chomping at the bit with that camera.

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02-20-2016, 08:55 AM	#12
Nicolas06 Veteran Member Join Date: Nov 2013 Posts: 4,854	Originally posted by Conqueror what will the 31/55/77 be like on FF? trying to understand how these might work on FF - what they will be similar to... (the resultant FOV mainly) imagine border sharpness might be down a bit on the 55 and 77.. may not be a big deal though Well its easy really, the 77 on the FF will behave rougly in term of field of view like the 55 today on APSC. The 55 himself on FF will behave rougly like the 31 today (more like a 35mm in fact). The 31mm will behave like a DA21 today. You could consider buying a DFA100 macro or a used F/FA 135 to approximate the reach the FA77 has on APSC with the new K1 FF. The math say 77x1.5 = 115.5, right between the 100 macro and the F/FA 135.

02-20-2016, 09:25 AM	#13
Conqueror Veteran Member Join Date: Dec 2011 Location: UK Posts: 440 Original Poster	Originally posted by Nicolas06 Well its easy really, the 77 on the FF will behave rougly in term of field of view like the 55 today on APSC. The 55 himself on FF will behave rougly like the 31 today (more like a 35mm in fact). The 31mm will behave like a DA21 today. You could consider buying a DFA100 macro or a used F/FA 135 to approximate the reach the FA77 has on APSC with the new K1 FF. The math say 77x1.5 = 115.5, right between the 100 macro and the F/FA 135. Ah thanks... I'm not fond of the FL of the 55 on APSC... but when it become ~35 on FF ... well that is ideal, 30-35 probably my favorite FL It was the 55 in particular I was wondering about... sometimes think about selling it..

02-20-2016, 09:35 AM	#14
Nicolas06 Veteran Member Join Date: Nov 2013 Posts: 4,854	You are welcome... But that mean if you choose to migrate to the FF, that the 77 will match the 55 field of view you are not found of on APSC. I can really understand you, I don't like 50-55 much myself and if I had 2 primes in the bags, that would be 21 and 77. Add a third and that would be the 35ltd.

02-20-2016, 11:34 AM	#15
gofour3 Site Supporter Join Date: Oct 2008 Location: Vancouver, Canada Posts: 8,089	Originally posted by Conqueror what will the 31/55/77 be like on FF? trying to understand how these might work on FF - what they will be similar to... (the resultant FOV mainly) imagine border sharpness might be down a bit on the 55 and 77.. may not be a big deal though You'll probably find that 31mm is not wide enough on FF and 77mm is not long enough. (28mm and 85mm are my favorites on film) I my books the FA43 will be the most useful of the FA Ltds on FF. Phil.