Message boards :
Cafe SETI :
Photographs by Setizens - Originals only - any subject
Message board moderation
Previous · 1 . . . 35 · 36 · 37 · 38 · 39 · 40 · 41 . . . 42 · Next
Author | Message |
---|---|
Carlos Send message Joined: 9 Jun 99 Posts: 30576 Credit: 57,275,487 RAC: 157 |
Many thanks for that, but they will only work with SLR & DSLR cameras with un-screwable lenses. My P500 is a bridge camera with a fixed lens. Nothing is impossible. But sometime the impossible costs a little more. Here is an adapter made for the P500 fixed lens camera. |
Gordon Lowe Send message Joined: 5 Nov 00 Posts: 12094 Credit: 6,317,865 RAC: 0 |
The problem with tele-converters and step-rings is they cut the light hitting the film plane by quite a bit, so you need a larger lens aperture, slower shutter speed, and more sensitive film, which lowers image resolution. I'm speaking purely from my background in 35mm photography, so I don't know how digital compensates for this. The mind is a weird and mysterious place |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 30987 Credit: 53,134,872 RAC: 32 |
The problem with tele-converters and step-rings is they cut the light hitting the film plane by quite a bit, so you need a larger lens aperture, slower shutter speed, and more sensitive film, which lowers image resolution. I'm speaking purely from my background in 35mm photography, so I don't know how digital compensates for this. Tele-converters do. They do that because they increase the focal length but obviously can't change the physical aperture, so the f marks on the lens barrel become wrong. Step rings, mount converters and the like don't. That's the physics. Digital can't compensate for physics. What it does is get a noisier picture by turning up the gain. Same as fast film having larger grain. |
Gordon Lowe Send message Joined: 5 Nov 00 Posts: 12094 Credit: 6,317,865 RAC: 0 |
Step rings, mount converters and the like don't. I think you're right. Those are just connection conversions, not focal length. The mind is a weird and mysterious place |
rob smith Send message Joined: 7 Mar 03 Posts: 22507 Credit: 416,307,556 RAC: 380 |
That type fit onto what would be the filter screw on the lens. You can probably find someone in the UK selling similar things, UK supplier will be in the right time zone for asking, and, from memory there are a few astronomy suppliers in Sarf Lardun Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
W-K 666 Send message Joined: 18 May 99 Posts: 19375 Credit: 40,757,560 RAC: 67 |
Does this page help. https://www.telescopeadapters.com/content/9-telescope |
rob smith Send message Joined: 7 Mar 03 Posts: 22507 Credit: 416,307,556 RAC: 380 |
Or try these guys - they are "fairly local" to you (well certainly closer than the USA) https://www.tringastro.co.uk/ Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Bernie Vine Send message Joined: 26 May 99 Posts: 9958 Credit: 103,452,613 RAC: 328 |
Today in the community garden, as it had been raining, I tied to get a shot of raindrops on a plant. I got this with my Canon Ixus . And this with my iPhone 5c If you look, you can just make out the reflection of my phone in the top raindrop. To be fair I brought a set of "clip on " lenses and I am impressed with the results so far. There is a macro, which was used here, a telephoto, a wide angle and a fish eye. If the sun stays out for long enough I will try some of the others out. |
Grant Nelson Send message Joined: 7 May 12 Posts: 8022 Credit: 4,237,757 RAC: 0 |
I bought a Canon 1 time but didn't have very much luck with it. it said it had a steady cam on it which to me didn't work very good. My very first Nikon was a gem and was lost in moving here, Like yours, great, sharp and easy to use, Yours looks like I could reach out and get my finger wet. LOL |
rob smith Send message Joined: 7 Mar 03 Posts: 22507 Credit: 416,307,556 RAC: 380 |
Step-downs are a bit less common that step-ups, but ebay, amazon etc. can be your friend Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Grant Nelson Send message Joined: 7 May 12 Posts: 8022 Credit: 4,237,757 RAC: 0 |
I have a 102 MM telescope but can't go much higher than 54 power. The moon is about all you can see more than that. it's a orion 102 MM, I like the scope the the rest is heavy. |
Admiral Gloval Send message Joined: 31 Mar 13 Posts: 21210 Credit: 5,308,449 RAC: 0 |
@ Chris You mentioned you have a iPhone 4s. What telescope you have, I don't know. This may be a cheaper option to astrophotography. You just have to purchase the proper smartphone adapter for your telescope. https://www.f1telescopes.co.uk/shop/accessories-by-brand/celestron-telescope-accessories/celestron-smartphone-adapters/celestron-x-cel-lx-to-iphone-44s-smartphone-adapter/ |
Admiral Gloval Send message Joined: 31 Mar 13 Posts: 21210 Credit: 5,308,449 RAC: 0 |
That is indeed another option to consider. The adaptor is £51 the eyepieces are £69 each. What is the brand name and model of your telescope? |
Suzie-Q Send message Joined: 9 Mar 07 Posts: 3351 Credit: 4,746,812 RAC: 1 |
Wow. I'm just lurking away. All our seti photographers are so talented!!! Thank you for sharing your lovely photos. +1 ~Sue~ |
zoom3+1=4 Send message Joined: 30 Nov 03 Posts: 66298 Credit: 55,293,173 RAC: 49 |
Wow. I'm just lurking away. All our seti photographers are so talented!!! Thank you for sharing your lovely photos. +2 Savoir-Faire is everywhere! The T1 Trust, T1 Class 4-4-4-4 #5550, America's First HST |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
A lot of these photographs aren't appearing on my screen. Instead there is a message from photobucket asking people to update their account. Bob DeWoody My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events. |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14679 Credit: 200,643,578 RAC: 874 |
A lot of these photographs aren't appearing on my screen. Instead there is a message from photobucket asking people to update their account.Yes, we can blame photobucket for that - and for the deluge of spam arriving in my inbox, asking me to update my account. I think you'll find that the problem mainly affects the older photographs - recent offerings are all displaying correctly, implying that the uploaders have adjusted by switching to an alternative hosting service. |
rob smith Send message Joined: 7 Mar 03 Posts: 22507 Credit: 416,307,556 RAC: 380 |
Quite a number of folks were caught by PhotoBucket changing its terms and conditions. This change basically said "pay us or you can't share your pictures". I know a number of people relied on PhotoBucket to store the master copy of all their photos, and are now in the process of getting them back, a task that is proving to be less than easy when the account is locked..... Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Suzie-Q Send message Joined: 9 Mar 07 Posts: 3351 Credit: 4,746,812 RAC: 1 |
Quite a number of folks were caught by PhotoBucket changing its terms and conditions. This change basically said "pay us or you can't share your pictures". I know a number of people relied on PhotoBucket to store the master copy of all their photos, and are now in the process of getting them back, a task that is proving to be less than easy when the account is locked..... I thought the issue was just sharing. The accounts shouldn't be locked, per se. The user should just be denied the option to link to the photo from another site. You mentioned sharing but, again, the accounts shouldn't be locked. ~Sue~ |
rob smith Send message Joined: 7 Mar 03 Posts: 22507 Credit: 416,307,556 RAC: 380 |
One person I know used their account primarily for sharing pics - and it was locked, they are still trying to get their pics back from PB as their account has been locked. They were a heavy user, lots of wild life pics shared all over the place, and PB "got hard" with them :-( Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.