Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-28-2015, 08:23 AM   #256
zan
Junior Member




Join Date: Sep 2015
Location: Ljubljana-Slovenia
Posts: 48
One year is too short.
I have bought a brand new Pentax flash AF540FGZ II and not been using much, only 200-300 shots. Hmmm, maybe this was the reason ???
Anyway, after a year and two months the flash has started firing at full power at every shot and making images not just overexposed but burned.
The problem was in transistor (IGBT fault).


Their warranty should be at least two years.

09-28-2015, 08:54 AM   #257
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,255
QuoteOriginally posted by Rondec Quote
Pentax has a year warranty because that's what they can get away with. People still are inclined to buy Pentax (if they own a pentax camera) over Sigma and Tamron, even if the lenses are similar and the off brand lenses have longer warranties.

On the list of things people consider when buying gear, warranty length is near the bottom.
QuoteOriginally posted by Na Horuk Quote
Still, just one year warranty doesn't really give much confidence, especially if you look at things like SDM failure in the past.

This is basically it. If they could lower it further without it looking suspicious, they would. The other brands try to build reputation with longer warranties, saying "hey, yes its third party, yes its cheaper, but we guarantee it will work."
And call me a sucker, but I do like to see products with long warranty, because modern business practices are often rather.. poor. Not necessarily with Pentax, but with too many things
And then, Canada has a 2 years warranty for those same products ... what goes?
09-28-2015, 09:21 AM   #258
Pentaxian




Join Date: Jan 2010
Location: Hoevelaken
Photos: Gallery
Posts: 900
QuoteOriginally posted by zan Quote
One year is too short.
I have bought a brand new Pentax flash AF540FGZ II and not been using much, only 200-300 shots. Hmmm, maybe this was the reason ???
Anyway, after a year and two months the flash has started firing at full power at every shot and making images not just overexposed but burned.
The problem was in transistor (IGBT fault).


Their warranty should be at least two years.
it is, mandatory 2 years in EU, go back to your dealer and let him fix it.
09-28-2015, 09:44 AM   #259
Junior Member




Join Date: Sep 2015
Posts: 39
QuoteOriginally posted by IchabodCrane Quote
Agree. If you change the type of glass on those elements, you'd also have to change the optical design along with it and there's no evidence that's been done.
Here is a product catalog from Tamron showing designs of all their lenses and descriptions of each element type. Notice that each lens has a listing of symbols showing which features the lens contains. Lenses such as the 28-300 and 18-270 (on page 11) have AD glass. The 24-70, on page 12, does not. Someone mentioned that XR and AD glass could be newer marketing speak for the same element, but the XR elements in the 24-70 Tamron are shown in the front of the lens (and their description makes it sound like they produce different results). The AD element in the Pentax schematic is shown in the middle of the lens. Unless the Pentax schematic is flat out wrong, that's the only credible information we actually have, and that evidence points to the two lenses being different. I would say that right now we have no evidence that it is an exact copy.

09-28-2015, 11:02 AM   #260
Site Supporter




Join Date: Aug 2013
Location: Chicago, IL
Posts: 416
Can I ask for clarification on two points:


1. Which ever sensor size a lens is designed for is what the focal length is stated as. The kit len is 18-55mm on APS-C, this 24-70mm is that on full frame.
2. This lens is 24-70mm on a full frame sensor. On the announcement page on the pentaxforums homepage I asked if this lens is equivalent to 16-46.67 on APS-C. Dpreview lists it as 37-107mm on APS-C. Is dpreview correct? Making a diagram it seems dpreview is correct.


Ricoh announces 24-70mm F2.8 for upcoming full-frame Pentax DSLR: Digital Photography Review
09-28-2015, 11:09 AM   #261
Pentaxian




Join Date: Jul 2012
Location: Albuquerque
Posts: 1,120
...

Anyone care to go down this road?

All interchangeable lenses are labeled with their true focal lengths, period. (Some superzooms I've seen with "35mm Equivalent" FLs on the barrel.)

The field of view will change, however, depending on which lens is matched with which camera. That's all there is to it.

So yes, a 16-50ish lens on an APSC camera will look similarly to this 24-70 on FF.

Also yes, this 24-70 on APSC will look similar to 35-105 on FF.
09-28-2015, 11:13 AM   #262
Site Supporter




Join Date: Apr 2015
Location: Normandy
Photos: Gallery | Albums
Posts: 56
QuoteOriginally posted by Newtophotos Quote
Can I ask for clarification on two points:


1. Which ever sensor size a lens is designed for is what the focal length is stated as. The kit len is 18-55mm on APS-C, this 24-70mm is that on full frame.
2. This lens is 24-70mm on a full frame sensor. On the announcement page on the pentaxforums homepage I asked if this lens is equivalent to 16-46.67 on APS-C. Dpreview lists it as 37-107mm on APS-C. Is dpreview correct? Making a diagram it seems dpreview is correct.


Ricoh announces 24-70mm F2.8 for upcoming full-frame Pentax DSLR: Digital Photography Review

24-70 on FX = 24/1,5 - 70/1,5 = 16-46,67 on DX; so Dprewiew are wrong.
09-28-2015, 11:22 AM - 1 Like   #263
Pentaxian




Join Date: Dec 2010
Location: Ontario
Photos: Gallery
Posts: 2,553
QuoteOriginally posted by Claudiu Quote
24-70 on FX = 24/1,5 - 70/1,5 = 16-46,67 on DX; so Dprewiew are wrong.
Nope, they're just taking a different point of view.

Mount this 24-70mm on an APS-C camera and it will have the same field of view as a 37-107mm mounted on a FF camera. (<-dpreview says this, though their wording is sloppy)

Mount this 24-70mm on a FF camera and it will have the same field of view as a 16-47mm mounted on an APS-C camera. (<-you're saying this, I guess)


Chose whichever format you like as a reference.

09-28-2015, 11:26 AM - 1 Like   #264
Senior Moderator
Loyal Site Supporter
Parallax's Avatar

Join Date: Apr 2008
Location: South Dakota
Photos: Gallery
Posts: 15,612
QuoteOriginally posted by Newtophotos Quote
1. Which ever sensor size a lens is designed for is what the focal length is stated as.
No. The focal length is the focal length. It is the physical properties of the lens and has nothing to do with the camera it will be used on.
09-28-2015, 11:30 AM   #265
Site Supporter




Join Date: Apr 2015
Location: Normandy
Photos: Gallery | Albums
Posts: 56
QuoteOriginally posted by BrianR Quote
Nope, they're just taking a different point of view.

Mount this 24-70mm on an APS-C camera and it will have the same field of view as a 37-107mm mounted on a FF camera. (<-dpreview says this, though their wording is sloppy)

Mount this 24-70mm on a FF camera and it will have the same field of view as a 16-47mm mounted on an APS-C camera. (<-you're saying this, I guess)


Chose whichever format you like as a reference.
Yes, you're right; both are valid ... I read after the announce at dpreview.
09-28-2015, 12:17 PM   #266
Pentaxian




Join Date: Nov 2013
Posts: 4,703
QuoteOriginally posted by Parallax Quote
No. The focal length is the focal length. It is the physical properties of the lens and has nothing to do with the camera it will be used on.
Except if there already a booster or a TC... Or except if the lense is not focussed to infinite... Also the focal length is very conventionnal thing as many lenses don't have the actual physical length that match the actual focal length.

While I agree with you, all this thing is confusing because we should speak in the end of angle of view, that make much more sense in term of photography... but for some reason the focal length in particular the one that give the equivalent angle of view on a 24x36 camera is used to describe the actual framing a lense give.
09-28-2015, 12:40 PM   #267
Senior Moderator
Loyal Site Supporter
Parallax's Avatar

Join Date: Apr 2008
Location: South Dakota
Photos: Gallery
Posts: 15,612
QuoteOriginally posted by Nicolas06 Quote
Except if there already a booster or a TC... Or except if the lense is not focussed to infinite...
Putting a TC on a lens does not change the lens itself any more than putting a different camera behind it changes the physical properties of the lens.
Yes, the FL changes with focus. Again, a physical property of the lens. Nothing to do with the size receptor that the image is projected onto.
You are right that the actual FL of a lens is rarely exactly what is marked on the barrel. A 50mm may only be an actual 47mm; but guess what? If it's an actual 47mm when you put it on an ME Super, it's still 47mm when you take it off of that and put it on a K-3.
The simple, incontrovertible fact is that a Xmm lens is a Xmm lens whether you put it on 24x36, APS-c, medium format, or use it for a paperweight.

Last edited by Parallax; 09-28-2015 at 12:47 PM.
09-28-2015, 01:09 PM   #268
Pentaxian
Edgar_in_Indy's Avatar

Join Date: May 2010
Location: Indiana, USA
Photos: Gallery
Posts: 2,636
QuoteOriginally posted by monochrome Quote
Dude. Warranties cost money.
And short warranties can cost sales. Especially when coupled with the perception that the brand in question has reliability problems.

I don't know if it's possible to measure sales that were lost and never happened, but Pentax lost a few thousand dollars in potential from this Pentax user. Pentax's short warranty and poor reputation for reliability and service are why all of my lenses are Sigma and Tamron. I bought a few of the less expensive Pentax lenses in the beginning, but it didn't take long to hear about the SDM problems and the crappy customer service, so once I started spending serious money on lenses I took my money elsewhere.

QuoteOriginally posted by monochrome Quote
Per Consumer Reports, 4% - 8% of cameras and lenses have a failure during their expected lifetimes. Should every single buyer of this lens, which has a hypersonic ring motor (read: 'USD') rather than a geared micromotor (read: 'SDM'), pay insurance for something they're 92% - 96% unlikely to use?
If that's the industry average, then I would have to believe the instance of failure was much higher for certain SDM lenses.

QuoteOriginally posted by monochrome Quote
If you're that worried about it buy the Tamron version.
That's excellent advise and I completely agree with you, but will Tamron be selling a K-mount version? That would be good news, but I thought that they usually didn't do that when there is an OEM version of the same lens.
09-28-2015, 01:17 PM   #269
Pentaxian




Join Date: Apr 2007
Location: Romania
Posts: 9,310
Strange. Tamron and Sigma have the same 2 years warranty as Pentax
09-28-2015, 01:31 PM   #270
Pentaxian




Join Date: Nov 2013
Posts: 4,703
QuoteOriginally posted by IchabodCrane Quote
Of course warranties cost money so why not have a 30 day warranty? They could charge less and/or put the savings into more developments.

Warranties are competitive features of an offering. The automotive industry in the USA didn't go from 12 month to 36 month (or more) warranties because they are just a bunch on nice guys doing nice things. They did it because someone else did and they wanted to remain competitive. There's no reason the camera industry is different.
I think that's because it would be ilegal in most countries.
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!
24-70mm, body, coatings, company, dslr, elements, f2.8, f2.8 ed sdm, fa, fa 24-70mm f2.8, fa*, factory, ff, filters, hd, lens, lenses, nikon, pentax, pentax news, pentax rumors, post, price, sdm, sdm wr, star, tamron, warranty, wr
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
HD Pentax-D FA 24-70mm F2.8 ED SDM WR Announced PF Staff Homepage & Official Pentax News 0 09-24-2015 03:00 PM
Lens Tournament: FA 77mm F1.8 Limited vs D FA 100mm F2.8 WR Macro Adam Pentax Forums Giveaways 17 10-27-2014 07:19 AM
For Sale - Sold: D-FA 100mm f2.8 Macro WR Eagle_Friends Sold Items 6 09-09-2014 10:00 AM
For Sale - Sold: Pentax D-FA 100mm f2.8 Macro WR & DA* 200mm F2.8 ED [IF] SDM jurysi Sold Items 11 09-17-2012 05:27 PM
New Pentax D FA 100mm F2.8 Macro WR Announced Zebooka Pentax News and Rumors 222 01-09-2010 03:51 PM



All times are GMT -7. The time now is 04:32 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