Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-17-2017, 02:53 AM   #256
New Member




Join Date: Jul 2014
Posts: 6
CNC baffles

Hi JBondo,

You might like to consider running the scheme through GroupGets, where people can commit to ordering one or more items, and you are not committed to a production run until you have a minimum number of orders. You can also specify a maximum. It is rather like KickStarter, but is intended for products which already exist and are proven rathere than for product development. It allows you to go into a decent sized production run, minimizing costs, without having to risk a sizable speculative investment.

Justin

11-17-2017, 01:08 PM   #257
New Member




Join Date: Nov 2017
Posts: 8
Does anyone know If this mod can be done on any DA* lens?
I found almost all the DA* series really cheap and new, for example the 60-250mm i can buy it for 600 euros. Do you think i should buy them all for my K-1 If they can be modified?
11-17-2017, 05:07 PM - 1 Like   #258
Loyal Site Supporter
Loyal Site Supporter
Scorpio71GR's Avatar

Join Date: Nov 2014
Location: Michigan
Photos: Gallery | Albums
Posts: 3,806
QuoteOriginally posted by Antoine_Pentaxian Quote
Does anyone know If this mod can be done on any DA* lens?
I found almost all the DA* series really cheap and new, for example the 60-250mm i can buy it for 600 euros. Do you think i should buy them all for my K-1 If they can be modified?
I believe the DA*60-250 was originally going to be a Full Frame lens. The 16-50 and 50-135 do not cover the Full Frame sensor. The DA*55 will cover the K-1 sensor without any modification. The DA*200 and DA*300 were both based on Full Frame lenses. They both have lens profiles built into the K-1 through firmware updates.
11-17-2017, 11:11 PM   #259
New Member




Join Date: Nov 2017
Posts: 8
QuoteOriginally posted by Scorpio71GR Quote
I believe the DA*60-250 was originally going to be a Full Frame lens. The 16-50 and 50-135 do not cover the Full Frame sensor. The DA*55 will cover the K-1 sensor without any modification. The DA*200 and DA*300 were both based on Full Frame lenses. They both have lens profiles built into the K-1 through firmware updates.
Wow! That that was so helpfull! I'll go with the DA* 60-250, the 55, and the 300. I don't see reason to buy the 200mm while im covered by the 60-250mm. Thank you sooooo much Scorpio71GR, you rock!!!

11-17-2017, 11:15 PM - 1 Like   #260
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 10,294
QuoteOriginally posted by Antoine_Pentaxian Quote
Wow! That that was so helpfull! I'll go with the DA* 60-250, the 55, and the 300. I don't see reason to buy the 200mm while im covered by the 60-250mm. Thank you sooooo much Scorpio71GR, you rock!!!
The DA* 200 is f/2.8 which matters to some uses. The DA* 60-250 f/4 is also heavier. However the most important factor is that even at 250mm the DA* 60-250 produces a smaller image than the DA* 200 at short distances (under 10 meters). The closer you are the more focus breathing you notice and the DA* 60-250 can be effectively not longer than a 135mm in image magnification when very close to minimum focus distances. This is not true of the DA* 200 - so for closer shooting the DA* 200 is a much "longer" lens. That can be very important or not at all important depending on your intended use. (I own both).
11-18-2017, 06:36 AM - 1 Like   #261
Loyal Site Supporter
Loyal Site Supporter
Scorpio71GR's Avatar

Join Date: Nov 2014
Location: Michigan
Photos: Gallery | Albums
Posts: 3,806
QuoteOriginally posted by UncleVanya Quote
The DA* 200 is f/2.8 which matters to some uses. The DA* 60-250 f/4 is also heavier. However the most important factor is that even at 250mm the DA* 60-250 produces a smaller image than the DA* 200 at short distances (under 10 meters). The closer you are the more focus breathing you notice and the DA* 60-250 can be effectively not longer than a 135mm in image magnification when very close to minimum focus distances. This is not true of the DA* 200 - so for closer shooting the DA* 200 is a much "longer" lens. That can be very important or not at all important depending on your intended use. (I own both).
This is very true and may be a consideration. My Tamron 70-200 has more magnification at 200mm then my 60-250 has at 250mm. At minimum focus distance the 60-250 can act almost like a 135mm prime. This why I have both. Different lenses for different uses. I mainly use the 60-250 for landscapes, the useful overall range, and for the weather sealing.

Since the 60-250 holds up so well to cropping it can be used for close ups, but I still prefer my Tamron.
250mm on the K3, I could not get this image on the K-1.

11-18-2017, 03:58 PM   #262
New Member




Join Date: Nov 2017
Posts: 8
QuoteOriginally posted by UncleVanya Quote
The DA* 200 is f/2.8 which matters to some uses. The DA* 60-250 f/4 is also heavier. However the most important factor is that even at 250mm the DA* 60-250 produces a smaller image than the DA* 200 at short distances (under 10 meters). The closer you are the more focus breathing you notice and the DA* 60-250 can be effectively not longer than a 135mm in image magnification when very close to minimum focus distances. This is not true of the DA* 200 - so for closer shooting the DA* 200 is a much "longer" lens. That can be very important or not at all important depending on your intended use. (I own both).
And that's why i love this forum!!! 😀 Thank you very much UncleVanya!!!

---------- Post added 11-18-17 at 04:14 PM ----------

QuoteOriginally posted by Scorpio71GR Quote
This is very true and may be a consideration. My Tamron 70-200 has more magnification at 200mm then my 60-250 has at 250mm. At minimum focus distance the 60-250 can act almost like a 135mm prime. This why I have both. Different lenses for different uses. I mainly use the 60-250 for landscapes, the useful overall range, and for the weather sealing.

Since the 60-250 holds up so well to cropping it can be used for close ups, but I still prefer my Tamron.
250mm on the K3, I could not get this image on the K-1.

I mostly want to cover live music in small jazz clubs where the distance between me and the musicians is from 5 to 7 metres, and theatrical plays with distances 8 to 15 metres away from the stage. For the live music i want to have the ability to get close portraits and for the theatre i want a bit wider action takes that might include some blury scenery for backround. What do you suggest guys?
11-18-2017, 04:46 PM - 1 Like   #263
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 10,294
QuoteOriginally posted by Antoine_Pentaxian Quote
And that's why i love this forum!!! 😀 Thank you very much UncleVanya!!!

---------- Post added 11-18-17 at 04:14 PM ----------



I mostly want to cover live music in small jazz clubs where the distance between me and the musicians is from 5 to 7 metres, and theatrical plays with distances 8 to 15 metres away from the stage. For the live music i want to have the ability to get close portraits and for the theatre i want a bit wider action takes that might include some blury scenery for backround. What do you suggest guys?
At those distances the lens is starting to show less focus breathing, but only you know what the lighting is like. Is an f/4 lens fast enough for you? If not then one of the 70-200's or the 50-135 and shoot crop mode or on a crop body.

11-18-2017, 05:01 PM - 1 Like   #264
Loyal Site Supporter
Loyal Site Supporter
Scorpio71GR's Avatar

Join Date: Nov 2014
Location: Michigan
Photos: Gallery | Albums
Posts: 3,806
For that type of shooting I strongly recommend a f2.8 lens. For wider shots I feel 70mm will be too narrow on a crop body.
11-19-2017, 11:05 AM   #265
New Member




Join Date: Nov 2017
Posts: 8
QuoteOriginally posted by UncleVanya Quote
At those distances the lens is starting to show less focus breathing, but only you know what the lighting is like. Is an f/4 lens fast enough for you? If not then one of the 70-200's or the 50-135 and shoot crop mode or on a crop body.
For the Jazz concerts i think f/4 is fast enough, the lighting is really good and they still use pars and pc lights directly on the musicians and for the rest of the stage quite bright pro led lights. For the theatre in very bright scenes f/4 is good but in a play you can't exept all the scenes to be bright and the action can be really fast, so an f/2.8 lense is a much better choice for sure. By your profile name i can tell that you like and know about theatre.

---------- Post added 11-19-17 at 11:09 AM ----------

QuoteOriginally posted by Scorpio71GR Quote
For that type of shooting I strongly recommend a f2.8 lens. For wider shots I feel 70mm will be too narrow on a crop body.
Do you think a 50mm is going to be good for wider shots with my K-1?
11-19-2017, 12:52 PM - 1 Like   #266
Loyal Site Supporter
Loyal Site Supporter
Scorpio71GR's Avatar

Join Date: Nov 2014
Location: Michigan
Photos: Gallery | Albums
Posts: 3,806
The one thing to remember is that a f2.8 lens let's twice the amount of light onto the AF sensor than a f4 lens. By no means does it mean you shoot all your shots a f2.8. It simply makes it easier for the camera to AF in low light. However you know your venue and I do not. I do know that my K-1 focuses faster with my Tamron 70-200 than with my 60-250 in low light. 50mm is considered a normal field of view on a full framer camera. On a sensor the normal field of view is the diagonal measurement of the sensor. On 24x36mm sensor the diagonal measurement is roughly 43mm, hence the FA43 Limited. This is considered the normal field of view of the human eye. A 50mm lens will give a slightly less field of view than your own eyesight on the K-1. Whether or not it will be wide enough depends on how far you will be from the stage. When I used to shoot these venues I always had two camera bodies. One with a fast zoom and one with a fast prime. The prime was anything between 28-50mm depending on how far I was from the stage.
11-20-2017, 05:59 AM - 1 Like   #267
Pentaxian
bdery's Avatar

Join Date: Mar 2008
Location: Quebec city, Canada
Photos: Gallery
Posts: 5,885
QuoteOriginally posted by Antoine_Pentaxian Quote
Does anyone know If this mod can be done on any DA* lens?
You got good answers, I'll simply confirm that the 16-50 and 50-135 cannot be modified for full frame. The 55, 200, 300 and 560 are already compatible. Some DA lenses such as the 40 can work also without corrections, but the camera has no profiles for it.

QuoteOriginally posted by Antoine_Pentaxian Quote
I mostly want to cover live music in small jazz clubs where the distance between me and the musicians is from 5 to 7 metres, and theatrical plays with distances 8 to 15 metres away from the stage. For the live music i want to have the ability to get close portraits and for the theatre i want a bit wider action takes that might include some blury scenery for backround. What do you suggest guys?
I'd be tempted to use a much faster lens for this, such as the 77 or 100 macr WR. Or maybe the 50-135 but its AF is slow.

F4 might be enough regarding light, but performers more all the time, so you might not be able to freeze the movements so much.
11-20-2017, 08:20 AM - 1 Like   #268
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 10,294
Here are some shots from the past made from at least 10 meters from stage, perhaps farther. These are Sooc unedited jpgs. You'll see my iso was between 800-1600 and most shots were at f 2.5-2.8.

https://flic.kr/s/aHsk8tsuGg
11-20-2017, 09:39 AM - 1 Like   #269
New Member




Join Date: Nov 2017
Posts: 8
QuoteOriginally posted by Scorpio71GR Quote
The one thing to remember is that a f2.8 lens let's twice the amount of light onto the AF sensor than a f4 lens. By no means does it mean you shoot all your shots a f2.8. It simply makes it easier for the camera to AF in low light. However you know your venue and I do not. I do know that my K-1 focuses faster with my Tamron 70-200 than with my 60-250 in low light. 50mm is considered a normal field of view on a full framer camera. On a sensor the normal field of view is the diagonal measurement of the sensor. On 24x36mm sensor the diagonal measurement is roughly 43mm, hence the FA43 Limited. This is considered the normal field of view of the human eye. A 50mm lens will give a slightly less field of view than your own eyesight on the K-1. Whether or not it will be wide enough depends on how far you will be from the stage. When I used to shoot these venues I always had two camera bodies. One with a fast zoom and one with a fast prime. The prime was anything between 28-50mm depending on how far I was from the stage.
Ill get the DA 200mm prime as well then for its faster lens and ill play with the shooting distance. I can get All three lenses the 50mm the 200mm and the 60-250mm for a really good price and ill start with those. In time i might trade the 60-250mm with a tamron 70-200 mm
I don't think i should miss that offer for the 60-250mm now.
11-20-2017, 11:14 AM - 1 Like   #270
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 10,294
QuoteOriginally posted by Antoine_Pentaxian Quote
Ill get the DA 200mm prime as well then for its faster lens and ill play with the shooting distance. I can get All three lenses the 50mm the 200mm and the 60-250mm for a really good price and ill start with those. In time i might trade the 60-250mm with a tamron 70-200 mm
I don't think i should miss that offer for the 60-250mm now.
Excellent choice.
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!
aps-c, contact, control, corners, da*, da* 60-250 mod, ff, glue, jis, k-mount, lengths, lens, mine, mod, monitor, mount, paint, pentax, pentax lens, ph, price, screw, slr lens, spray, springs, tube, vignette
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax DA* 60-250, RRS L bracket for K-5 prices reduced again djc737 Sold Items 7 06-27-2015 05:08 AM
AS plate for the DA*60-250/300 lens foot interested_observer Pentax Camera and Field Accessories 20 03-23-2015 06:31 PM
Backpack for DA*60-250 and 16-50 gastch Pentax Camera and Field Accessories 18 01-23-2015 11:46 AM
DA* 60-250 owners: How do you carry your 60-250 at the ready? apisto Pentax SLR Lens Discussion 23 03-13-2013 05:42 AM
DA*60-250/4 - FF, sharp and fast. ogl Pentax SLR Lens Discussion 19 11-01-2008 04:11 PM



All times are GMT -7. The time now is 07:14 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