Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-22-2015, 05:51 PM   #1
Senior Member




Join Date: Jun 2015
Photos: Albums
Posts: 235
Tamron Adaptall 2 500mm lens

Any tips on how to handheld a 500mm lens. I picked up the adaptall mirror and it also came with TC if I wanted to have 1000mm lens. I was wondering if anyone had any tips for handling such a beast. Thanks!

09-22-2015, 08:46 PM   #2
Pentaxian




Join Date: Jul 2010
Location: Oregon
Photos: Albums
Posts: 1,425
The 500mm mirror is a lot easier to handle than a refracting lens. As with any extreme tele, tripod or sandbag helps. The lens has low contrast, so increasing contrast, microcontrast and saturation in post-production helps.


09-23-2015, 01:15 AM   #3
Pentaxian




Join Date: Jul 2010
Location: Oregon
Photos: Albums
Posts: 1,425
Tip for handholding: use very short exposure times, 1/500" and faster.
09-23-2015, 02:32 AM   #4
Veteran Member
old4570's Avatar

Join Date: Feb 2013
Location: Melbourne
Photos: Albums
Posts: 2,524
I have one , and if mem serves its fixed F8 ..

I have used mine with 2x and 3x tele converters .. And the hardest thing was getting a good focus .. ( Moon )
The viewfinders on SLRs are just a wee bit small ...
So if you have focus peeking or live view , might be an idea to use it .

09-23-2015, 10:19 AM   #5
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 5,383
Mirror lenses have a center obstruction which makes some out of focus parts of the image look odd. It's often called "donut bokeh" because points look like small rings. You can see them clearly if the point is a bright highlight. Tree branches or tall grass start to look doubled. As the donuts get more and more out of focus they blend together into an even blur. Take some shots of birds in trees and you'll see what I mean. The effect gets stronger when you add contrast in processing, so I like to avoid shots with out of focus branches.

I use live view a lot to focus. The focus confirmation hexagon will not always work because f8 is darker than the AF sensors like, and the lower contrast doesn't help. When you use a 2X teleconverter, the lens is effectively f16. I use a Tamron Adaptall teleconverter, the 01F.

For shots of the moon, you have to consider how fast the moon is moving across the frame, and raise ISO enough to compensate. I ended up doing a test one night to figure out a minimum shutter speed. I raised ISO until I got a well-exposed moon shot at 1/125. Then I lowered shutter speed to 1/60 and dropped ISO one stop, so I got the same exposure for my second shot. Do that for 1/30 and so on. Look at the shots later on a big screen at 100% and you should see when the shutter speed gets too slow. When I did this, I was using a K-7 which was not that great at ISO 1600, so I also looked at the noise level and dynamic range to see where the best compromise was.
09-23-2015, 11:07 AM   #6
Loyal Site Supporter
Loyal Site Supporter
fwcetus's Avatar

Join Date: Sep 2006
Location: New England
Photos: Gallery | Albums
Posts: 1,285
QuoteOriginally posted by Just1MoreDave Quote
Mirror lenses have a center obstruction which makes some out of focus parts of the image look odd. It's often called "donut bokeh" because points look like small rings. [...]
For shots of the moon, [...].
Well, at least for the moon shots you don't have to worry about donut bokeh (unless you're trying to include a tree, etc., in the frame, of course).
09-23-2015, 12:00 PM   #7
Senior Member




Join Date: Jun 2015
Photos: Albums
Posts: 235
Original Poster
Thanks guys great tips! Sky is pretty clear now, so I can hopefully get some solid moon shots tonight! Thank You!
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!
500mm, adaptall, adaptall 2 500mm, k-mount, lens, pentax lens, slr lens, tamron adaptall, tips
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
types of adaptall and lens id, tamron 200-500mm? ripit Pentax SLR Lens Discussion 11 09-11-2013 07:00 PM
For Sale - Sold: Tamron Adaptall SP500 500mm Mirror Lens 55BB stormtech Sold Items 5 10-21-2012 06:21 PM
For Sale - Sold: Tamron Adaptall-2 SP (55BB) 500mm f/8 (mirror) Lens Clarky Sold Items 3 08-16-2011 02:58 AM
For Sale - Sold: Tamron 500mm f/8.0 (55bb), Tamron 28-70mm (44a), adaptall-2 p/k, Vivitar 283 f hinman Sold Items 7 03-03-2010 08:42 PM



All times are GMT -7. The time now is 12:01 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