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02-20-2016, 03:47 AM   #1
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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

02-20-2016, 04:18 AM   #2
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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
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QuoteOriginally posted by clackers Quote
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
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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
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QuoteOriginally posted by Apapukas Quote
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
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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
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QuoteOriginally posted by Apapukas Quote

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
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Short answer? Fantastic.

02-20-2016, 06:55 AM   #9
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QuoteOriginally posted by clackers Quote
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
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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
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QuoteOriginally posted by Apapukas Quote
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.
02-20-2016, 08:55 AM   #12
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QuoteOriginally posted by Conqueror Quote
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
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QuoteOriginally posted by Nicolas06 Quote
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
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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
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QuoteOriginally posted by Conqueror Quote
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.
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