Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-12-2020, 04:11 PM - 4 Likes   #16
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 27,344
forego the equivalency garbage - buy a lens and try it; don't like it, try another....

DA21 Limited
DA35 Limited
DA40 Limited

all are the bomb...

03-12-2020, 04:12 PM   #17
Senior Member




Join Date: Mar 2020
Posts: 249
Original Poster
Does anyone here have any experience with the 28mm f3.5 on APS-C?
SMC Pentax 28mm F3.5 Reviews - K Prime Lenses - Pentax Lens Reviews & Lens Database

There is one asking for $210 around my area.
03-12-2020, 04:22 PM - 2 Likes   #18
Pentaxian




Join Date: May 2016
Photos: Gallery
Posts: 3,105
For $210, I'd personally get one of the limited lenses pepperberry lists above (used), you'll have a much easier life metering them and they're arguably better value if you're not interested in owning less common vintage glass
03-12-2020, 04:28 PM - 1 Like   #19
Senior Member




Join Date: Feb 2012
Location: Columbus Ohio USA
Posts: 259
QuoteOriginally posted by Angelic Layer Quote
Does anyone here have any experience with the 28mm f3.5 on APS-C?
SMC Pentax 28mm F3.5 Reviews - K Prime Lenses - Pentax Lens Reviews & Lens Database

There is one asking for $210 around my area.
it might be a great lens I have never used it but that price seems high.

I think you have the thread k5ii with 3 lenses vs a k70 with one. I would decide on that and use those lenses for awhile.

Without revisiting the other thread you have a 35 and 50 mm. Both of you camera options come with a 18-55 kit lens.

03-12-2020, 04:38 PM   #20
Senior Member




Join Date: Mar 2020
Posts: 249
Original Poster
QuoteOriginally posted by Sidney Porter Quote
it might be a great lens I have never used it but that price seems high.

I think you have the thread k5ii with 3 lenses vs a k70 with one. I would decide on that and use those lenses for awhile.

Without revisiting the other thread you have a 35 and 50 mm. Both of you camera options come with a 18-55 kit lens.
Yeah, I just have a better feeling with a wide-ish prime, wanting to see the options available for my shooting style/habits.
03-12-2020, 06:29 PM - 1 Like   #21
Loyal Site Supporter
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 15,003
QuoteOriginally posted by Angelic Layer Quote
I am shooting the four third system after moving from 35mm film, thinking that the interchangeable adapter would enable me to use my older lenses but it didn't quite turn out the way I expected as they didn't appear as wide in the smaller sensor.
Now most DSLR in the market uses APS-C sized sensors, so 50mm on 35mm = 33.33mm, 35mm = 23.33mm.
There isn't really that much wider prime lens in the market to match up these previous standards, I still can find 14mm and 15mm, as well as 28mm for the K mount or with M42 adapter.

This question have probably been asked before, what would be your "standard" prime lens (focal length) of choice say for everyday use, or suitable for street?
The classic street photography lens equivalent in K-mount APS-C is the DA21 Ltd pancake, a great lens for the job.

But you're not shooting Pentax, right?

It has no aperture ring though for your m43 to use. Setting exposure will be tedious with an adapter.
03-12-2020, 06:30 PM - 4 Likes   #22
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 41,084
QuoteOriginally posted by Angelic Layer Quote
Yeah, I just have a better feeling with a wide-ish prime, wanting to see the options available for my shooting style/habits.
Just for the sake of clarity, wide-ish on APS-C starts at 24mm. Here is a table mapping traditional terms and usage to prime lens focal lengths for APS-C:
  • Ultra tele: 200mm and longer
  • Long tele: 135mm to 200mm
  • Medium tele: 70mm to 135mm
  • Short tele: 45mm to 70mm
  • Normal: 28mm to 40mm
  • Wide angle: 18mm to 24mm
  • Ultra wide: 16mm and shorter
  • Birding and wildlife: 200mm and longer
  • Motorsports: 100mm to 200mm
  • Team sports: 70mm to 200mm
  • Portraits: 35mm to 90mm (or longer according to style)
  • Street: 15mm to 24mm
  • Landscape -- far: 70mm to 200mm (or longer according to style)
  • Landscape -- close/tight: 14mm (or shorter according to style) to 35mm
  • Urban/Architecture -- close in: 14mm to 24mm
There are genres I have skipped and a few where others might have additional great suggestions. For example, I did not address astrophotography (very little experience) or fisheye (used extensively, but is an acquired skill).


Steve


Last edited by stevebrot; 03-12-2020 at 06:37 PM. Reason: clarity
03-12-2020, 06:35 PM - 2 Likes   #23
Site Supporter
Site Supporter
ramseybuckeye's Avatar

Join Date: Apr 2009
Location: Hampstead, NC
Photos: Gallery
Posts: 14,323
QuoteOriginally posted by Angelic Layer Quote
I am shooting the four third system after moving from 35mm film, thinking that the interchangeable adapter would enable me to use my older lenses but it didn't quite turn out the way I expected as they didn't appear as wide in the smaller sensor.
Now most DSLR in the market uses APS-C sized sensors, so 50mm on 35mm = 33.33mm, 35mm = 23.33mm.
There isn't really that much wider prime lens in the market to match up these previous standards, I still can find 14mm and 15mm, as well as 28mm for the K mount or with M42 adapter.
On a four third system a normal filed of view would be closer to 25mm. When the crop factor language is used it is 2.0 and not 1.5 like APSC, but the lens is the same focal length, the smaller sensor just creates a narrower field of view.
03-12-2020, 06:38 PM   #24
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 41,084
QuoteOriginally posted by clackers Quote
But you're not shooting Pentax, right?
He is getting a K-5IIs, if I read the other thread right.


Steve
03-12-2020, 06:42 PM - 2 Likes   #25
Senior Member




Join Date: Mar 2020
Posts: 249
Original Poster
QuoteOriginally posted by clackers Quote
The classic street photography lens equivalent in K-mount APS-C is the DA21 Ltd pancake, a great lens for the job.

But you're not shooting Pentax, right?

It has no aperture ring though for your m43 to use. Setting exposure will be tedious with an adapter.
I will be shooting one by this weekend, I would get the K-5 by tomorrow or Sunday.
03-12-2020, 08:41 PM   #26
Loyal Site Supporter
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 15,003
QuoteOriginally posted by Angelic Layer Quote
I will be shooting one by this weekend, I would get the K-5 by tomorrow or Sunday.
Obviously the KP is more compact and better suited to street photography, but a secondhand K-5 is cheaper.
03-12-2020, 08:57 PM - 1 Like   #27
Senior Member




Join Date: Mar 2020
Posts: 249
Original Poster
QuoteOriginally posted by clackers Quote
Obviously the KP is more compact and better suited to street photography, but a secondhand K-5 is cheaper.
The KP is nice but not a lot nice than K-70, I would add in more for the K-1 for its full frame if there is a good deal.
03-12-2020, 09:16 PM - 1 Like   #28
Site Supporter
Site Supporter
disconnekt's Avatar

Join Date: Oct 2011
Location: Riverside, CA
Photos: Albums
Posts: 1,398
QuoteOriginally posted by Angelic Layer Quote
The same lens instead of wider ones on APS-C?
Those lenses are on full frame camera, for aps-c you would need a 24mm to have a similiar fov of a 35mm, and a 35mm to have a similiar fov of a 50mm.

24mm x 1.5 = 36mm
35mm x 1.5 = 52mm

---------- Post added 03-12-20 at 09:18 PM ----------

And for M43-mount cameras (Olympus, Panasonic), since they have a 2x crop, you would need a 17mm to have a similiar fov of a 35mm lens, and a 25mm to have a similiar fov of a 50mm lens

17mm x 2 = 34mm
25mm x 2 = 50mm
03-12-2020, 09:42 PM - 1 Like   #29
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 20,077
I shoot m43 and apsc and a tiny little bit of 35mm film.

I too thought I'd use adapted lenses more.

I found the most utility on telephoto landscapes and portraits. 50 f1.4, 77 f1.8, 100 f2.8, 200 f2.8 all had some interesting uses, the longer ones get less used since I got my Panasonic 45-175, the portrait 42.5 f1.7 has pushed off some of the others. At the wider end, the m43 stuff is very good, and easier to use than adapted lenses.

On m43 I've shot 17mm and 20mm and 30mm primes as my normal lens. I also use some zooms, but typically these are slow due to cost and size. The 17 leans a bit wider than normal but I like the perspective. The 20 hits a sweet spot for me even more. The 30 is a familiar framing. On apsc, I've used the fa 31 and fa 35 for normal lenses but more often I'm using a zoom or the da 40.

I hope that helps.

Last edited by UncleVanya; 03-13-2020 at 08:10 AM.
03-12-2020, 10:43 PM - 1 Like   #30
Pentaxian




Join Date: Dec 2016
Location: Southeastern Michigan
Posts: 3,341
QuoteOriginally posted by Angelic Layer Quote
50mm on 35mm = 33.33mm, 35mm = 23.33mm.
I am not following this equation. Your thread topic states "35mm (film) equivalent in APS-C" for a standard prime lens. Well, a typical standard prime lens for 35mm film is the good old fast 50mm lens, usually with f/2, f/1.7, or f/1.4 as options. With Pentax, a fine-performing lens made specifically for APS-C is the DA 35mm f/2.4 and then there's the FA 35mm f/2 which was made as a moderate wide angle for 35mm film, but its focal length becomes as a 50mm would be on a film body if used on APS-C.

Last edited by mikesbike; 03-12-2020 at 10:57 PM.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
17mm, 24mm, 25mm, 35mm, 50mm, adapter, aps-c, apsc, camera, da, ff, focus, fov, k-mount, lens, lens 35mm equivalent, lenses, lot, market, pentax, pentax lens, sense, slr lens, system
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Advice on best 35mm APS-C equivalent (K-70)? Engineworks Pentax SLR Lens Discussion 31 01-26-2020 01:11 PM
Fast "standard" prime for MZ-3 HibikiTaisuna Pentax SLR Lens Discussion 27 01-01-2019 03:31 PM
Your favorite 35mm APS-C format prime lens Wolfie665 Pentax SLR Lens Discussion 70 12-22-2018 04:46 PM
A gap in the APS-C prime line up, 18mm? (The missing 28mm equivalent?) bobbotron Pentax SLR Lens Discussion 23 02-03-2016 09:47 AM
What does "..equivalent to 52.5mm in 35mm format" mean? tim mcdonough Troubleshooting and Beginner Help 9 03-20-2012 05:36 PM



All times are GMT -7. The time now is 01:14 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top