Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-16-2013, 05:31 PM   #1
Veteran Member
spystyle's Avatar

Join Date: Mar 2009
Location: Maine, USA
Posts: 424
18-55 lens only has 37mm of range ...

Howdy from Maine USA

OK, it's Summer at the time of this writing. There is so much Sunshine during the day that an aperture of f/8~f/11 is all I need.

The idea for a lens :

Honestly, considering how sunny it is in the Summer during the day, I think a manufacturer should release an 18-200mm f/8 - I bet that would be nice and lightweight with lots of range.

The conspiracy :

So I'd like more focal range, my 18-55mm lens just feels so ... short.

So I started to think of focal range, I did the math 55 minus 18 and that's 37mm of range.

Well compared to the old kit lenses 28-80mm, they had 52mm of range !

Now I realize kit lenses are shrinking in range !

Cheers,
Craig

07-16-2013, 05:44 PM   #2
Veteran Member
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 11,275
QuoteOriginally posted by spystyle Quote
Howdy from Maine USA

OK, it's Summer at the time of this writing. There is so much Sunshine during the day that an aperture of f/8~f/11 is all I need.

The idea for a lens :

Honestly, considering how sunny it is in the Summer during the day, I think a manufacturer should release an 18-200mm f/8 - I bet that would be nice and lightweight with lots of range.

The conspiracy :

So I'd like more focal range, my 18-55mm lens just feels so ... short.

So I started to think of focal range, I did the math 55 minus 18 and that's 37mm of range.

Well compared to the old kit lenses 28-80mm, they had 52mm of range !

Now I realize kit lenses are shrinking in range !

Cheers,
Craig
Or the equivalent of 27-82.5mm which is a FF equivalent range of 55.5mm
07-16-2013, 05:59 PM   #3
Veteran Member
spystyle's Avatar

Join Date: Mar 2009
Location: Maine, USA
Posts: 424
Original Poster
Hmmm "equivalent" ...

18mm x 1.5 = 27 "equivalent"
55 x 1.5 = 82.5 "equivalent"
82.5 - 27 = 55.5 "equivalent" range ...

Mind blown ! LOL

How about 28-80mm on a DX sensor ...
28 x 1.5 = 42 "equivalent"
80 x 1.5 = 120 "equivalent"
120 - 42 = 78mm "equivalent" range !

LOL

How about an 18-55mm lens on a micro four thirds camera ? (like an Olympus E-PL1 with 2x crop factor)

18 x 2 = 34mm "equivalent"
55 x 2 = 110mm "equivalent"
110 - 34 = 66mm "equivalent" range

How about an 18-55mm lens on a Pentax Q with it's 5.64 crop factor.

18 x 5.64 = 101.52
55 x 5.64 = 310.2
310.2 - 101.52 = 208.68mm "equivalent" range

But I wonder why we consider the "35mm film equivalent" anyway ?

An 18-55mm lens is an 18-55mm lens, period. And our DX sensors are DX sensors, not equivalent to 35mm film.

I think this whole "equivalent" fiasco is just a way for manufacturers to trick us.

The literal fact is, our current kit lenses have less literal range than yesterday's kit lenses. 37mm on 18-55mm lenses versus 52mm on 28-80mm lenses. 18-70mm would be the same range.

OK thanks,
Craig

Last edited by spystyle; 07-16-2013 at 07:46 PM.
07-16-2013, 07:50 PM   #4
Site Supporter




Join Date: Mar 2012
Location: Perrineville, NJ
Posts: 1,365
You do realize that (55/18) > (80/28), right?

07-16-2013, 08:17 PM   #5
Veteran Member
spystyle's Avatar

Join Date: Mar 2009
Location: Maine, USA
Posts: 424
Original Poster
55 divided by 18 = 3.05 (as in 3X zoom range)

80 divided by 28 = 2.8 (as in 2.8X zoom range)

Oh mind blown again !
07-16-2013, 08:26 PM   #6
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,863
There are 18-200s already that probably start not to be terrible at f8.
07-17-2013, 04:49 AM   #7
Site Supporter




Join Date: Mar 2012
Location: Perrineville, NJ
Posts: 1,365
If the goal was to minimize cost and size, the lens would probably be a variable zoom, like f/5.6 - f/11 or whatever.

Of course, a more compact overall package for a long zoom range would be a bridge camera. The X-5 lens is f/3.1 - f/5.9. Image quality difference for the smaller sensor is there, but for shooting in bright daylight like you suggest, it's not as drastic. Not saying this fits your specific needs, but this is where the industry as a whole has gone, for the scenario you describe, all for $200, It's kind of hard to market a slow superzoom K-mount lens against that.
07-17-2013, 05:06 AM   #8
arv
Site Supporter




Join Date: Aug 2010
Photos: Albums
Posts: 376
18 - 135mm is also being sold as a kit lens...

07-17-2013, 07:20 AM   #9
Veteran Member
spystyle's Avatar

Join Date: Mar 2009
Location: Maine, USA
Posts: 424
Original Poster
Thanks all for chiming in
07-17-2013, 07:33 AM   #10
Veteran Member
scratchpaddy's Avatar

Join Date: Feb 2013
Location: Phoenix
Posts: 2,360
If you want lots of mm in range, you need to get the 50-500mm Bigma. That's 450mm!

Seriously, though, it is as they said: it's all about the ratio between the min and max focal length, not the absolute distance between them.

The lens you want is out there. Several of them, actually. I have a Tamron 18-200mm that cost $140. The actual aperture is f/3.5-6.3, but you're welcome to keep it stopped down to f/8 the whole time. It's quite good at f/8, though not so good wide-open.

Superzooms don't get much love from the serious photographer community, but every time I look at the pictures I've taken with that budget lens, I'm surprised by how much they don't suck.
07-17-2013, 08:07 AM   #11
Veteran Member
spystyle's Avatar

Join Date: Mar 2009
Location: Maine, USA
Posts: 424
Original Poster
That's a good idea
07-17-2013, 01:28 PM   #12
Pentaxian
Sagitta's Avatar

Join Date: Feb 2011
Location: Maine
Photos: Gallery
Posts: 2,939
FWIW, I use an old 28-90mm kit lens as my walkaround lens, and I have no regrets about doing so.
07-17-2013, 01:57 PM   #13
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,868
Thats an interesting idea. I wonder if a manufacturer could pull it off in an attractive package. I would be interested in a high-quality slow zoom, if it were very compact and offered at a reasonable price.
Btw, there already are some zooms that kind of fit your idea (though, they are f4 and faster), like the 17-70mm f4, 18-250mm, 18-270mm, 55-300mm, and the high-end 60-250mm f4,..
07-17-2013, 02:46 PM   #14
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,910
My 12-24 has only 12mm of range and cost way more than that kit lens. And the Limiteds have even worse range - none. What a ripoff. I should sell the lot.
07-17-2013, 03:03 PM   #15
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
QuoteOriginally posted by Na Horuk Quote
Thats an interesting idea. I wonder if a manufacturer could pull it off in an attractive package. I would be interested in a high-quality slow zoom, if it were very compact and offered at a reasonable price.
Btw, there already are some zooms that kind of fit your idea (though, they are f4 and faster), like the 17-70mm f4, 18-250mm, 18-270mm, 55-300mm, and the high-end 60-250mm f4,..
They do, on things called bridge cameras
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!
day, k-mount, kit, lens, lenses, pentax lens, range, slr lens, summer
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Australian site - K-r + 18-55 kit. only $349 pixelvandal Pentax Price Watch 4 01-21-2013 03:33 AM
For Sale - Sold: K10D - Body Only or w/18-55 Kit Lens + EXTRAS!! (CONUS) scarr2k Sold Items 3 11-14-2010 02:03 PM
For Sale - Sold: Mint K10D (only 2200 clicks), DA 18-55, DA 18-55 II for sale sbbtim Sold Items 9 10-19-2009 09:52 AM
For Sale - Sold: Pentax K100D w/ only 600 actuations! Also, 18-55 kit lens dumrox Sold Items 6 01-07-2009 08:27 AM



All times are GMT -7. The time now is 09:52 AM. | 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